"The very best funfetti sugar cookie you'll ever eat... and it's the size of a cake! Top with thick vanilla-almond frosting and more sprinkles. Yield: one 9-inch cookie cake..."
INGREDIENTS
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1/2 cup (115g) unsalted butter, softened to room temperature
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3/4 cup (150g) granulated sugar
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1 large egg + 1 egg yolk*
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2 teaspoons vanilla extract
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1 and 1/2 cups (190g) spoon & leveled Gold Medal all-purpose flour
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1/4 teaspoon salt
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1 teaspoon baking powder
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1/2 teaspoon baking soda
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1 and 1/2 teaspoons cornstarch
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2/3 cup (120g) white chocolate chips
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1/2 cup (80g) rainbow sprinkles (not nonpareils)*
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VANILLA ALMOND FROSTING
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1/2 cup (115g) unsalted butter, softened to room temperature
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1 and 3/4 cups (150g) confectioners' sugar
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2 Tablespoons (30ml) heavy cream or half-and-half*
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1 teaspoon vanilla extract
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1/4 teaspoon almond extract*
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salt, to taste
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extra sprinkles for decorating on top