"If you like coffee, caramel and chocolate then you will love this easy sheet cake topped with chocolate espresso buttercream!..."
INGREDIENTS
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1 cup buttermilk ((room temperature))
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4 tsp instant espresso powder or instant coffee granules
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½ cup unsalted butter ((room temperature))
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1 cup packed brown sugar
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2 large eggs ((room temperature))
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1 tsp vanilla extract
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2 cups all-purpose flour
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2 tbsp cornstarch ((or arrowroot starch))
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1½ tsp baking powder
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½ tsp baking soda
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½ tsp salt
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¼ tsp ground nutmeg
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¾ cup homemade caramel sauce ((or store-bought caramel ice cream topping))
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⅔ cup packed brown sugar
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6 tbsp unsalted butter
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2 tbsp whole milk
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dash of salt
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1 tbsp baking cocoa
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2 tsp instant coffee granules
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¼ cup boiling water
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½ cup butter ((room temperature))
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¼ cup powdered sugar
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¾ cup chopped, dark chocolate ((75% or higher cocoa))