Boston Cream Sheet Cake Horizontal 2
Photo: 12 Tomatoes Creative Team

Boston Cream Sheet Cake takes everything we love about the classic dessert and turns it into a simple dessert for a crowd. You still get that creamy vanilla filling and rich chocolate topping—but without any fuss. Using a boxed cake mix keeps things easy, while still feeling like a homemade treat. It’s the kind of dessert that looks impressive but comes together with very little effort.

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Photo: 12 Tomatoes Creative Team
Boston Cream Sheet Cake Vertical 1
Photo: 12 Tomatoes Creative Team

You’ll start out by baking the cake mix accorading to the package directions. Next, comes the crucial step. Poking holes all over the surface of the cake. When the smooth vanilla pudding is poured over the top, it seeps down into every nook and cranny, creating a moist, custard-like layer throughout.

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Photo: 12 Tomatoes Creative Team
Boston Cream Sheet Cake Vertical 4
Photo: 12 Tomatoes Creative Team

Then comes the chocolate ganache, and this is where things really come together. Hot cream poured over semi-sweet chocolate chips melts into a silky, glossy topping that spreads beautifully over the chilled cake. It’s rich without being too heavy and adds that signature “Boston cream” finish. Letting it cool slightly before pouring ensures it sets up just right on top.

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Photo: 12 Tomatoes Creative Team
Boston Cream Sheet Cake Vertical 13
Photo: 12 Tomatoes Creative Team

The hardest part of this recipe is waiting for it to chill long enough before slicing. Giving it a few hours (or overnight) in the refrigerator helps all the layers set and meld together. The result is a perfectly sliceable cake with distinct layers of fluffy cake, creamy filling, and smooth chocolate. It’s a guaranteed hit for potlucks, family gatherings, or anytime you need a dessert that everyone will love.

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Photo: 12 Tomatoes Creative Team
Boston Cream Sheet Cake Vertical 9
Photo: 12 Tomatoes Creative Team