Gluten-Free Giant Devil's Food Whoopie Pie
This oversized whoopie pie transforms classic cake mix into an impressive dessert featuring two tender devil's food cake layers sandwiched with fluffy marshmallow cream filling and topped with rich chocolate ganache. Perfect for celebrations or when you want to make a statement dessert that serves a crowd. The combination of moist chocolate cake, sweet creamy filling, and glossy ganache creates the ultimate comfort dessert.
Ingredients
Instructions
- 1
Heat oven to 350°F or 325°F for dark or nonstick pans and spray two 8-inch round cake pans with baking spray
- 2
Beat cake mix, water, oil and eggs with electric mixer on low speed until moistened, then on medium speed for 2 minutes
- 3
Pour batter into prepared pans and bake for 14 to 20 minutes or until toothpick inserted in center comes out clean
- 4
Cool in pans for 10 minutes, then remove to cooling racks and cool completely
- 5
Beat butter, marshmallow creme, powdered sugar and vanilla with electric mixer on high speed until light and fluffy
- 6
Place one cake layer rounded side down on serving plate and spread filling over cake
- 7
Top with second layer rounded side up
- 8
Heat whipping cream over low heat until hot but not boiling, then stir in chocolate until melted
- 9
Cool ganache about 10 minutes, then pour onto top of cake and spread with spatula
Tips
Use room temperature eggs for better mixing and a more tender cake texture.
Let ganache cool slightly before pouring to prevent it from running off the cake completely.
Store loosely covered to prevent the ganache from becoming too firm while maintaining freshness.
Good to Know
Store loosely covered at room temperature for 2-3 days or refrigerate for up to 1 week.
Can assemble cake layers and filling up to 1 day ahead; add ganache just before serving.
Serve at room temperature for best flavor and texture.
Common Mistakes
Don't overbake the cake layers to avoid dry texture.
Cool ganache properly to avoid it running off the cake completely.
Substitutions
Dairy-Free Swaps
Vegan Options
FAQ
Can I use homemade cake instead of mix?
Yes, substitute with your favorite chocolate cake recipe baked in two 8-inch rounds.
How long does this keep?
Store covered at room temperature for 2-3 days or refrigerate for up to 1 week.
Can I freeze this whoopie pie?
Freeze assembled pie without ganache for up to 3 months; add ganache after thawing.