INGREDIENTS
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Yellow Cupcake
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1 2/3 cups (240g) all purpose flour
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1 cup (200g) sugar
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1/4 tsp baking soda
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1 tsp baking powder
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3/4 cup salted butter (170g), room temperature
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1 egg
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1 egg yolk
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3 tsp vanilla extract
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1/2 cup (120ml) sour cream
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1/2 cup (120ml) milk
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Chocolate Frosting
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1/2 cup butter
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1/2 cup shortening
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3 1/2 cups powdered sugar
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1/2 cup cocoa
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3-4 tbsp water or milk