The Be-All and End-All Chocolate Fudge Sheet Cake

Every week, baking expert Alice Medrich will be going rogue on Food52—with shortcuts, hacks, and game-changing recipes.

Today: Deep, dark, and fudgy, this old-fashioned, American-style sheet cake is best eaten cold, straight from the cooler, at your picnic or barbecue. 

My writing partner and coauthor of Flavor Flours, Maya Klein, created this irresistible American-style chocolate cake with knock-your-socks-off milk chocolate frosting.

The cake is made with rice and oat flours, rather than wheat, and it’s so darned good that you won’t need to make a separate cake for people who can eat wheat. Trust me.

Baked in a sheet, it’s perfect for a barbecue or picnic. On a hot day, refrigerate the cake for a few hours beforehand, then let the cake sit in the shade to prevent the frosting from melting. Otherwise, postpone frosting for another day—the naked cake is still something to write home about.

Maya's Chocolate Fudge Sheet Cake

Serves 12

For the cake:

2 cups (400 grams) sugar
1 1/3 cups (200 grams) white rice flour
1/2 cup (50 grams) oat flour (gluten-free oat flour if gluten is an issue)
1/2 teaspoon salt
1/4 teaspoon xanthum gum
1 1/2 teaspoons baking powder
3/4 teaspoon baking soda
2 large eggs
1 cup milk
2 teaspoons pure vanilla extract
1/2 cup neutral flavored vegetable oil (such as corn, safflower, or soybean)
1 cup boiling water

For the milk chocolate frosting:

1 cup heavy cream
17 1/2 ounces (500 grams) milk chocolate or 55% to 62% dark chocolate, coarsely chopped
1/4 teaspoon salt, plus more to taste
1/2 pound (225 grams/2 sticks) unsalted butter, very soft

See the full recipe (and save and print it) here.

Pick up a copy of Alice's James Beard Award-winning book Flavor Flours, which includes nearly 125 recipes—from Double Oatmeal Cookies to Buckwheat Gingerbread—made with wheat flour alternatives like rice flour, oat flour, corn flour, sorghum flour, and teff (not only because they're gluten-free, but for an extra dimension of flavor, too). 

Photos by James Ransom

from Food52

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