Prep Time: 15 minutes minutes
Cook Time: 9 minutes minutes
Resting Time: 30 minutes minutes
Total Time: 54 minutes minutes
Dairy-Free: To make dairy-free whoopie pies, use vegan butter in place of unsalted butter and substitute dairy-free homemade sour milk for the buttermilk. To make sour milk, add 1 tablespoon of distilled vinegar to a 1-cup measuring cup. Fill the cup with plant milk to the 1-cup line and stir. Let sit for 3-5 minutes and then use the sour milk in place of the buttermilk as directed.