Blog How Do You Cook Frozen Mashed Potatoes October 28, 2021 No Comments Oven. Place frozen or thawed potatoes in a covered oven-safe dish and heat in a 350º F oven for 20 to 30 minutes, stirring occasionally, until heated through View Full Details [tmaf_similar_searches keyword=”frozen mashed”] Related Posts How Much Vinegar Does It Take To Flush A Tankless Water Heater? October 28, 2021 How Does A Tankless Water Heater Need To Be Vented? October 28, 2021 How Do You Prime A Tankless Water Heater? October 28, 2021 Write A Comment Cancel Reply Save my name, email, and website in this browser for the next time I comment.