"These molten cookie dough cupcakes are homemade vanilla cupcakes filled with cookie dough and topped with chocolate chip cookie dough buttercream...."
INGREDIENTS
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2 and 1/4 cups (280g) heat-treated all-purpose flour* (spoon & leveled)
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2 and 1/4 teaspoons cornstarch
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3/4 teaspoon salt
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3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
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1 cup (200g) packed light or dark brown sugar
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1/3 cup (80ml) pasteurized egg whites, at room temperature*
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2 teaspoons pure vanilla extract
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1 cup (180g) mini semi-sweet chocolate chips
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1 and 3/4 cups (215g) all-purpose flour (spoon & leveled)
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1 teaspoon baking powder
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1/4 teaspoon baking soda
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1/2 teaspoon salt
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1/2 cup (120ml) whole milk, at room temperature
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1/2 cup (120g) sour cream, at room temperature
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1/2 cup (1 stick; 115g) unsalted butter, softened to room temperature
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1 cup (200g) granulated sugar
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1/3 cup (80ml) pasteurized egg whites, at room temperature*
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2 teaspoons pure vanilla extract
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1 cup (2 sticks; 230g) unsalted butter, softened to room temperature
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2 teaspoons pure vanilla extract
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1 Tablespoon heavy cream or milk
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1 teaspoon salt
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3 cups (360g) confectioners’ sugar, sifted
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remaining cookie dough