Microwave – You can microwave 1 to as many that can fit in a plate in a single layer. Place pancakes on a microwave safe plate. Frozen pancakes take approximately 20 seconds for 2 pancake and 60 seconds to 90 seconds for 4 to 6 pancakes.  Oven Method – Preheat oven to 375 degrees F (190 degrees C) Place frozen pancakes on a lined baking sheet in a single layer and then cover with aluminum foil. Heat for approximately 20 minutes or until the pancakes are hot and toasty all the way through.