INGREDIENTS
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1 and 2/3 cup all-purpose flour (measured the correct way)
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1/2 teaspoon baking powder
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1/4 teaspoon baking soda
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1/2 teaspoon salt
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3/4 cup sugar
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1/4 light brown sugar
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1/2 cup (1 stick) unsalted butter, melted
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1 large egg
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1/4 cup yogurt (plain or vanilla; or greek yogurt; or sour cream)
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3/4 cup milk (cow's milk; or soy milk; or almond milk)
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1 Tablespoon vanilla extract
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2/3 cup sprinkles (not nonpareils)
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Vanilla Buttercream
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1 cup (2 sticks) unsalted butter, softened to room temperature
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3-4 cups powdered (confectioners') sugar
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1/4 cup heavy cream (see note above about substituting milk or half-and-half)
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2 and 1/2 teaspoons vanilla extract
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salt, as needed