"Moist brown sugar cupcakes brushed with rum syrup, injected with homemade butterscotch sauce, topped with whipped mascarpone frosting and drizzled with more butterscotch sauce and toffee bits...."
INGREDIENTS
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1/4 cup (57 g) dark brown sugar
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1/4 cup (59 ml) water
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2 teaspoons (10 ml) white or dark rum
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1/4 cup (57 g) unsalted butter
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1 cup (228 g) packed light or dark brown sugar
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3/4 cup (180 ml) whipping cream (35%)
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2 teaspoons (10 ml) pure vanilla extract
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1/2 teaspoon (4 g) sea salt or fleur de sel
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1-3/4 cups (236 g) all-purpose flour, sifted
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1/2 cup (57 g) cake flour, sifted
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1 cup (230 g) packed dark brown sugar
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2-1/2 teaspoons (13 g) baking powder
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1/2 teaspoon (4 g) salt
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1 cup (227 g) unsalted butter, cold and cut into small even pieces
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2/3 cup (160 ml) milk, at room temperature
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2 teaspoons (10 ml) pure vanilla extract
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1 teaspoon (5 ml) lemon juice
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3 eggs, at room temperature
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1 cup (240 ml) whipping cream (35%), cold
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3/4 cup (94 g) confectioners' sugar
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1 cup (240 ml) mascarpone cheese, softened
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Toffee bits for sprinkling