"Moist lemon cupcakes topped with sweet vanilla buttercream and a lemon funfetti cookie. Be sure that you allow yourself time to make the cookies ahead of time (recipes in the links) or purchase a small lemon bakery cookie. Add sprinkles to your heart's content!..."
INGREDIENTS
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1 recipe Lemon Funfetti Sugar Cookies (see note)
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For the Cake:
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1 box white cake mix
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1 ( 3 ounce) package instant lemon pudding
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½ teaspoon salt
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1 cup water
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⅓ cup fresh lemon juice + the zest of 2 lemons
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2 tablespoons vegetable oil
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1 teaspoon vanilla
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1 cup sour cream OR plain Greek yogurt
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4 egg whites
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For the Vanilla Buttercream:
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1 cup (2 sticks) unsalted butter at room temperature
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4 cups powdered sugar, sifted
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a pinch of salt
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2 teaspoons vanilla
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2 tablespoons heavy cream (as needed)