To make a batch, whisk 1/2 cup each sugar and buttermilk, 1/4 cup vegetable oil, 1 egg and 1/2 teaspoon vanilla in a large bowl until smooth. Whisk in 1⁄3 cup flour, 2 tablespoons unsweetened cocoa powder, 1/8 teaspoon baking soda and a pinch of salt. Butter 4 small microwave-safe mugs and divide the batter among them. Microwave, one at a time, until a toothpick comes out clean, about 2 minutes. Make a slit in the center of each cake and pipe marshmallow cream into the slit. Top the cake with warmed chocolate frosting, then pipe white frosting squiggles on top.
Tools You May Need
Photograph by Ralph Smith
Tools You May Need
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