Full of peanut butter cups, dark chocolate, and peanut butter swirls; this is a warm hug in a bowl.
INGREDIENTS
Cake
1 cup (125 grams) all-purpose flour
2/3 cup (150 grams) light brown sugar
1 teaspoon baking powder
1/4 cup (20 grams) cocoa powder
1/2 teaspoon flaky sea salt
1/2 cup (120 milliliters) milk
1 large egg
1/3 cup (80 grams) unsalted butter, melted
1 teaspoon vanilla extract
1/2 cup (150 grams) peanut butter cups, chopped to 1/2 inch chunks
1/2 cup (75 grams) bittersweet chocolate chips, or roughly chopped chocolate
1/2 cup creamy peanut butter, for swirling
Sauce
1/4 cup (20 grams) cocoa powder
2/3 cup (150 grams) light brown sugar
1 cup (250 milliliters) boiling water
1/2 teaspoon instant coffee powder
1/4 teaspoon sea salt
DIRECTIONS
Heat the oven to 350°F (180°C). Grease a deep 9x13-inch baking dish.
To make the cake, add the flour, sugar, baking powder, cocoa powder and salt to a large bowl and whisk to break up any lumps. In a medium bowl, combine the milk, egg, butter, and vanilla and pour this into the flour mixture. Stir until the batter is smooth and without large lumps. Gently fold in the chopped peanut butter cups and chocolate chips, then pour the batter into the prepared dish.
Swirl in peanut butter; dollop several spoonfuls across the top and swirl them into the batter with a knife. Don’t worry about making it look perfect, as it will get messed up a bit in the next step. Set aside.
To make the sauce, add the cocoa powder, sugar, boiling water, and coffee powder to a medium bowl and stir together with a fork, removing any lumps. Pour the liquid carefully on top of the cake batter–it will look very strange at this point, but don’t worry or try to mix it in.
Bake until the cake is puffy and just set. A toothpick poked in the center will show chocolate sauce and some crumbs. Start checking at 15 minutes if using a metal pan. It can take up to 28 to 35 minutes in a smaller or thicker pan. There’ll be a pool of chocolate sauce underneath once you break the crust. Serve hot. Leftovers can be refrigerated, and you can reheat portions in the microwave.
Enjoy!
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