Make Almond & Coconut Flour Mini Muffins Add the dry ingredients and whisk. (Also, preheat oven to 350 degrees.) Add wet ingredients and whisk. Peel and mash each banana in a bowl. Mix in the mashed bananas and whisk. Pour in the batter. Fill 3/4 of the way to the rim. Put the muffins in the oven for 12 minutes. Test with a toothpick. When it’s clean, the muffins are ready. Remove the muffins from and let them cool for 15 minutes. Use a toothpick to remove from the tray.