Opening the oven door quite too often while it is baking makes cold air enter in the oven and might be the reason for the muffins to sink. Another reason can be that you used little too much batter for each muffin.
Egg Substitute 101
RECENT RECIPES
COOKING RECIPES
DONT MISS ALL TIME GREATS
Eggless Vanilla Cake
(from 307 reviews)
The Best Eggless Pancakes Ever & Video
(from 559 reviews)
I Can't Believe It's Eggless Chocolate Cake!
(from 150 reviews)
Vegan Blueberry Muffins
(from 194 reviews)
Eggless Vanilla Cupcakes
(from 65 reviews)