Theresa Ketterling

Photograph of Theresa Ketterling

Theresa is a Staff Writer at RTINGS.com. Before joining the company in 2020, she worked as a newspaper reporter. She first wrote about blenders and vacuums, but with a greater passion for cooking than cleaning, she now focuses on kitchen appliances. In her free time, she enjoys experimenting with new recipes.

Articles by Theresa Ketterling

Tovala Smart Oven Toaster Oven Review

Breville the Smart Oven BOV800XL Toaster Oven Review

Breville the Mini Smart Oven BOV450XL Toaster Oven Review

Smeg 4-Slice Toaster Toaster Review

Breville Die-Cast 4-Slice Smart Toaster Toaster Review

Dualit Design Series 4 Slice Toaster Review

Our Mattress Tests: Cooling

The 5 Best Memory Foam Mattresses

Cuisinart Digital Air Fryer CTOA-130PC3 Toaster Oven Review

Breville the Smart Oven Air Fryer Pro BOV900BSS Toaster Oven Review

The 5 Best Mattresses For Side Sleepers

Hamilton Beach Sure-Crisp 31196FG Toaster Oven Review

Hamilton Beach 31143 Toaster Oven Review

BALMUDA The Toaster Toaster Oven Review

The 5 Best Cooling Mattresses

Cuisinart 4 Slice Custom Select Toaster Toaster Review

Bose QuietComfort 45/QC45 Wireless Headphones Review

Bose 700 Headphones Wireless Headphones Review

Apple AirPods (3rd generation) Headphones Review

Sennheiser MOMENTUM 4 Wireless Headphones Review

Audeze Maxwell Headphones Review

The 5 Best Microwaves

Saatva Classic Mattress Review

Beautyrest Black Mattress Review

Serta Perfect Sleeper Innerspring Mattress Review

Tempur-Pedic TEMPUR-Adapt Mattress Review

Beautyrest Silver BRS900 Mattress Review

Stearns & Foster Lux Estate Mattress Review

Zinus Original Green Tea 2024 Mattress Review

Purple Mattress Mattress Review

Puffy Lux Mattress Review

Saatva Latex Hybrid Mattress Review

Puffy Lux (Canadian Version) Mattress Review

Sealy Posturepedic Hybrid Mattress Review

Novaform ComfortGrande Plus Mattress Review

Saatva Rx Mattress Review

Sealy Posturepedic Plus Mount Auburn Mattress Review

DreamCloud Premier Hybrid (Canadian Version) Mattress Review

WinkBeds The WinkBed Mattress Review

Novaform Serafina Pearl Mattress Review

DreamCloud Premier Hybrid Mattress Review

Helix Midnight Luxe 2025 Mattress Review

Nectar Premier Mattress Review

Beautyrest Mattress Mattress Review

Novaform Legacy Mattress Review

Puffy Royal Mattress Review

Saatva Classic (Plush Soft) Mattress Review

Purple RestorePlus Hybrid Mattress Review

Tuft and Needle Mint Mattress Review

Allswell Hybrid Mattress Review

WinkBeds Plus Mattress Review

Nolah Evolution Mattress Review

Toshiba ML-EC42P(SS) Microwave Review

Panasonic NN-CD87KS Microwave Review

Panasonic NN-CD66NS Microwave Review

The 5 Best Small Microwaves

GE JES1109RRSS Microwave Review

GE JES1145SHSS Microwave Review

Cuisinart CMW-100 Microwave Review

KitchenAid KMHS120ESS Microwave Review

LG LMC0975ST Microwave Review

Toshiba ML2-EM09PA(BS) Microwave Review

Toshiba EM925A5A-BS Microwave Review

Insignia NS-MW09SS8 Microwave Review

Panasonic NN-SN77HS Microwave Review

Sharp SMC1162HS Microwave Review

Panasonic NN-SC67NS Microwave Review

Panasonic NN-SN975S Microwave Review

Panasonic NN-SN67HS Microwave Review

GE JES1072SHSS Microwave Review

Hamilton Beach Quantum Air Fryer 31350G Toaster Oven Review

Cuisinart Air Fryer TOA-70 Toaster Oven Review

Cuisinart Air Fryer TOA-60 Toaster Oven Review

Whirlpool WMH32519HZ Microwave Review

Panasonic NE-12523 Microwave Review

The 6 Best Toaster Brands

Status Between 3ANC True Wireless Headphones Review

Gourmia Digital Air Fryer GTF7900 Toaster Oven Review

COSORI Smart Air Fryer CS130-AO Toaster Oven Review

The 5 Best Firm Mattresses

The 5 Best 8-Quart Air Fryers

Toshiba EM131A5C-BS Microwave Review

GE JVM3160RFSS Microwave Review

LG LMV1764ST Microwave Review

Breville the Smooth Wave Microwave Review

Cuisinart CMW-70 Microwave Review

GE JVM6175SKSS Microwave Review

LG MVEL2033F Microwave Review

LG MVEM1825F Microwave Review

Dreo ChefMaker Air Fryer Review

Beautiful 9QT TriZone Air Fryer Review

The 5 Best Air Fryer Toaster Ovens

Test Bench 1.0.1: Changelog

Test Bench 1.0.2: Changelog

nutribullet Blender Combo Blender Review

Ninja Fit Blender Review

Ninja Foodi Power Blender Ultimate System Blender Review

Vitamix Venturist V1200 Blender Review

Ninja Foodi Power Mixer System Blender Review

Vitamix Explorian E310 Blender Review

Wolf Gourmet Pro-Performance Blender Review

Ninja Professional Plus Blender DUO with Auto-iQ Blender Review

Oster Pro 1200 Blender Review

Vitamix 5200 Blender Review

KitchenAid K400 Blender Review

Ninja Mega Kitchen System [BL770, BL770AMZ, BL771] Blender Review

Oster MyBlend Blender Review

KitchenAid K150 Blender Review

nutribullet Pro 900 Blender Review

Ninja Professional Plus Kitchen System with Auto-iQ Blender Review

KitchenAid Variable Speed Corded Hand Blender Blender Review

Hamilton Beach Professional Quiet Blender Blender Review

Breville The Q Blender Review

Breville the Fresh & Furious Blender Review

Vitamix Propel 750 Blender Review

Vitamix Propel 510 Blender Review

Ninja Nutri Ninja Auto-iQ Blender Review

Ninja Nutri-Blender Pro with Auto-iQ Blender Review

Ninja Professional Blender 1000 Blender Review

Ninja Blast Blender Review

Beast Health Blender Blender Review

nutribullet Ultra Blender Review

Ninja Detect Duo Power Blender Pro Blender Review

Ninja Detect Power Blender Pro Blender Review

Black+Decker Quiet Blender with Cyclone Glass Jar Blender Review

Hamilton Beach Wave Crusher Multi-Function Blender Review

BlendJet 2 Blender Review

Oster Master Series Blender with Texture Select Settings Blender Review

Ninja Detect Kitchen System TB401 Blender Review

Ninja TWISTi High-Speed Blender DUO Blender Review

KitchenAid Go Cordless Hand Blender Blender Review

nutribullet Triple Prep System Blender Review

Vitamix Venturist Pro Blender Review

Ninja Deluxe Kitchen System CO905KS Blender Review

Ninja SMOOTHIEiQ CO750B Blender Review

nutribullet Flip Blender Review

Braun TriForce Power Pro JB9041BK Blender Review

Vitamix Ascent X2 Blender Review

Vitamix Ascent X3 Blender Review

Vitamix Ascent X4 Blender Review

Vitamix Ascent X5 Blender Review

nutribullet SmartSense Blender Combo Blender Review

Ninja Blast Max BC251 Blender Review

Vitamix 2-Speed Immersion Blender Review

Breville the Super Q BBL920 Blender Review

Beast Mega 1200 Plus Blender Review

Beast Mighty 850 Plus Blender Review

Ninja AF101 Air Fryer Review

Instant Vortex Plus 140-3088-01 Air Fryer Review

Dash Compact Air Fryer Review

Beautiful 6qt Digital Air Fryer Review

Ninja Max XL AF161 Air Fryer Review

Ninja Foodi DZ401 Air Fryer Review

Ninja Foodi DZ550 Air Fryer Review

COSORI TurboBlaze Air Fryer Review

Chefman TurboFry RJ38-5-T Air Fryer Review

Ninja Foodi DZ071 Air Fryer Review

Ninja Foodi DZ201 Air Fryer Review

Cuisinart AIR-200 Air Fryer Review

Ninja Pro AF141 Air Fryer Review

Ninja DoubleStack SL201 Air Fryer Review

Ninja Speedi SF301 Air Fryer Review

Gourmia GAF798 Air Fryer Review

BELLA 6qt Pro 90165 Air Fryer Review

BELLA 8qt Pro 90088 Air Fryer Review

The 5 Best Mattresses-In-A-Box

The 5 Best Mattresses For Heavy People

The 4 Best 2-Slice Toasters

Astro A40 TR Headset + MixAmp Pro 2019 Headphones Review

The 5 Best 4-Slice Toasters

Amazon Echo Gen 4 Speaker Review

Ninja Foodi DT201 Toaster Oven Review

Jabra Elite 8 Active Headphones Review

Sony PULSE Explore Truly Wireless Headphones Review

Samsung Galaxy Buds2 Pro Headphones Review

nutribullet Portable Blender Review

Test Bench 1.1: Changelog

The 4 Best Dehumidifiers

Same Mattress, Different Construction: Our Testing Finds Significant Unit-To-Unit Variance

How To Choose A Mattress

Test Bench 1.0.1: Changelog

Hybrid Mattresses vs Memory Foam: Which Is Right For You?

Beyerdynamic DT 1770 PRO Headphones Review

Which Type Of Blender Is Right For You?

Mattress Size Guide And Dimensions Chart

Ultimate Ears WONDERBOOM 3 Speaker Review

How We Test Blenders: Transforming Data Into Objective Reviews

How To Clean A Toaster

HyperX Cloud III Headphones Review

How We Test Air Fryers: Transforming Data Into Objective Reviews

nutribullet GO Blender Review

Magic Bullet Portable Blender Blender Review

Frigidaire Gallery GCRE306CBF Toaster Oven Review

Test Bench 1.0: Changelog

Dash Mini DMTO100 Toaster Oven Review

Black+Decker Natural Convection 4-Slice TO1756SB Toaster Oven Review

Wolf Gourmet Elite WGCO150S Toaster Oven Review

Panasonic FlashXpress NB-G110P Toaster Oven Review

Ninja Flip SP151 Toaster Oven Review

Anova Precision Oven 2.0 Toaster Oven Review

Our Blender Performance Tests: Controls and Programs

Our Blender Performance Tests: Nut Butter

Vitamix 5-Speed Immersion Blender Review

KitchenAid 5-Speed Hand Blender Blender Review

PopBabies Portable Blender Blender Review

nutribullet Smart Touch Blender Combo Blender Review

Ninja Professional Blender NJ601AMZ Blender Review

Ninja vs. nutribullet Blenders: Bought, Tested, and Compared

Beautiful Personal Blender Blender Review

Beautiful High Performance Blender with Touch-Activated Display Blender Review

Vitamix 7500 Blender Review

Sony WF-1000XM3 Truly Wireless Headphones Review

Vitamix A3300 Blender Review

Ninja Nutri-Blender Plus Blender Review

Vitamix Professional Series 750 Blender Review

Vitamix A2300 Blender Review

Ninja Chef Blender Blender Review

Cuisinart Soho Compact Blender Blender Review

Brentwood 12-Speed Pulse Blender with Glass Jar Blender Review

Blendtec Total Blender Classic Blender Review

Blendtec Classic 575 Blender Review

Blendtec Chef 600 Blender Review

Magic Bullet Blender Blender Review

Ninja Blender Duo with Auto-iQ BL642 Blender Review

Ninja Foodi Power Pitcher System [CO351B, SS351] Blender Review

Vitamix A2500 Blender Review

Breville Control Grip Blender Review

nutribullet Pro 1000 Blender Review

nutribullet Rx Blender Review

nutribullet Pro+ Blender Review

Test Bench 1.0: Changelog

Samsung Jet 90 Complete Vacuum Review

Shark WANDVAC System [WS620, WS632, WS642] Vacuum Review

Smeg BLF01 Blender Review

Magic Bullet Combo Blender Blender Review

Turtle Beach Stealth 600 Gen 2 Headphones Review

Vitamix ONE Blender Review

ZWILLING ENFINIGY Personal Blender Blender Review

Beast Mini Blender Plus Blender Review

Bose QuietComfort Earbuds Truly Wireless Headphones Review

Beats Solo Pro Headphones Review

JBL Tune 660NC Wireless Headphones Review

Denon PerL Pro True Wireless Headphones Review

Cuisinart EvolutionX RHB-100 Blender Review

Crux Artisan Series Cordless Immersion Blender Blender Review

KitchenAid KHBBV53 Blender Review

Fresh Juice Portable Blender Blender Review

Sony PULSE 3D Wireless Headphones Review

Audio-Technica ATH-M50xBT2 Wireless Headphones Review

Our Blender Performance Tests: Fibrous Ingredients

JBL Endurance Peak 3 True Wireless Headphones Review

Vitamix vs Ninja Blenders: Bought, Tested, and Compared

Calphalon ActiveSense Blender Review

Vitamix vs Blendtec Blenders: Bought, Tested, and Compared

Astro A10 Gen 2 Headphones Review

SteelSeries Arctis 9 Wireless Headphones Review

Astro A30 Wireless Headphones Review

Hamilton Beach Power Elite Multi-Function Blender Review

Revolution InstaGLO R180 Toaster Review

JBL Tune Flex True Wireless Headphones Review

Breville the 'A Bit More' 2 Slice Toaster Review

Cuisinart 4 Slice Compact Plastic Toaster Toaster Review

BELLA Classics 2 Slice Toaster Toaster Review

Black+Decker 4-Slice Toaster TR4900SSD Toaster Review

Smeg 2-Slice Toaster Toaster Review

Sur La Table Touchscreen 2-Slice Toaster Toaster Review

KitchenAid 2-Slice Toaster with manual lift lever Toaster Review

Oster 2-Slice Toaster with Quick-Check Lever Toaster Review

Black+Decker 2-Slice Toaster T2569B Toaster Review

Wolf Gourmet Four Slice Toaster Toaster Review

Hamilton Beach 2 Slice Toaster with Extra-Wide Slots 22217 Toaster Review

GE 4-Slice Toaster Toaster Review

Cuisinart Long Slot Toaster Toaster Review

yeedi K650 Robot Vacuum Review

Roborock S6 MaxV Robot Vacuum Review

Roborock S4 Max Robot Vacuum Review

Skullcandy Dime 2 True Wireless Headphones Review

Logitech G733 LIGHTSPEED Wireless Headphones Review

Razer Barracuda X Wireless 2021 Headphones Review

Razer BlackShark V2 Headphones Review

Bose SoundTrue Around-Ear II Headphones Review

Raycon The Fitness Earbuds (2021 Edition) True Wireless Headphones Review

iRobot Roomba 981 Robot Vacuum Review

Logitech G432 Headphones Review

Corsair HS80 RGB WIRELESS Headphones Review

Amazon Echo Buds (2nd generation) Headphones Review

Xibonol Portable Blender Blender Review

Wyze Buds Truly Wireless Headphones Review

Amazon Echo Buds (3rd generation) Headphones Review

Smeg Personal Blender PBF01 Blender Review

Jabra Elite 3 True Wireless Headphones Review

Samsung Galaxy Buds+ Headphones Review

Cuisinart EvolutionX Cordless Rechargeable Personal Blender Blender Review

Ninja Foodi Power Pitcher SS201 Blender Review

KitchenAid Diamond Blender Review

Ninja Smart Screen Blender Review

Ninja DUO Blender Review

Hamilton Beach Single-Serve Blender Blender Review

Jabra Elite 4 Active True Wireless Headphones Review

Ninja Nutri Ninja Pro Blender Review

Breville Boss To Go Sport Blender Review

Smeg HBF02 Blender Review

Cuisinart Smart Stick Two-Speed Hand Blender Blender Review

AfterShokz Aeropex Bone Conduction Headphones Review

All-Clad KZ750DGT Blender Review

Braun MultiQuick 7 Blender Review

Braun MultiQuick 5 Blender Review

Braun MultiQuick 9 Blender Review

Bamix The Original Blender Review

Bamix Mono M133 Blender Review

EarFun Air Pro True Wireless Headphones Review

GE Appliances Immersion 2-Speed Blender Review

Blendtec Designer 725 Blender Review

Cuisinart Smart Stick Cordless Hand Blender Blender Review

Magic Bullet Kitchen Express Blender Review

Jabra Elite Active 75t Truly Wireless Headphones Review

Apple AirPods (2nd generation) Headphones Review

Shark IQ Robot AV992 Robot Vacuum Review

nutribullet Immersion Blender Blender Review

Sennheiser PXC 550-II Wireless Headphones Review

iRobot Roomba 614 Robot Vacuum Review

Sennheiser MOMENTUM True Wireless 2 Headphones Review

Ultimate Ears FITS Truly Wireless Headphones Review

Sony WF-SP800N Truly Wireless Headphones Review

Mueller Ultra-Stick Hand Blender Blender Review

JBL Tune 125TWS Truly Wireless Headphones Review

Skullcandy Grind Fuel True Wireless Headphones Review

TOZO NC2 Truly Wireless Headphones Review

Jabra Elite 75t Truly Wireless Headphones Review

Logitech G333 Headphones Review

Samson SR850 Headphones Review

Sennheiser HD 599 Headphones Review

Anker Soundcore Life Dot 2 Truly Wireless Headphones Review

Our Blender Performance Tests: Crushed Ice

Our Blender Ease of Use Tests: Cleaning

Our Vacuum Performance Tests

ROCCAT Syn Pro Air Wireless Headphones Review

SteelSeries Arctis 7 2019 Edition Wireless Headphones Review

Sony WF-XB700 Truly Wireless Headphones Review