Mounds Cake

If you love Mounds bars, this chocolate sheet cake captures that same dark-chocolate-meets-sweet-coconut combination in a shareable, fork-friendly format.

The base is a boxed chocolate cake mix baked in a sheet pan. While it bakes, you heat milk, sugar, and marshmallows together until everything melts into a sticky, pourable syrup. Stir in a full bag of coconut and spread that mixture over the still-warm cake. The warmth helps it bond to the surface and soak slightly into the crumb.

That coconut-marshmallow layer sets up as it cools into something chewy and fudgy, almost like a thick candy filling sitting on top of the cake. Frost over the top and you’ve got three layers of texture: tender chocolate cake, gooey coconut center, and smooth frosting.

Kitchen Tips

• Spread the coconut-marshmallow mixture while the cake is still slightly warm. Too hot and it slides off; completely cool and it won’t adhere.
• Use sweetened shredded coconut for the closest Mounds bar flavor. Unsweetened will work but tastes drier and less candy-like.
• A chocolate frosting doubles down on the Mounds vibe. A simple ganache (chocolate chips melted with heavy cream) is an easy choice.
• Let the coconut layer cool and set completely before frosting. If it’s still warm, the frosting will melt and slide.

Variations

• Almond Joy version: Press whole almonds into the coconut layer before frosting for an Almond Joy twist.
• Dark chocolate ganache: Use bittersweet chocolate for the frosting to lean into the dark chocolate Mounds profile.
• Toasted coconut: Toast half the coconut in a dry skillet before mixing it in for a nuttier, more complex flavor.