INGREDIENTS
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1 tablespoon butter (you can substitute butter spread)
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1 tablespoon brown sugar
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1 teaspoon granulated sugar
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3 drops pure vanilla extract
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1/8 teaspoon baking powder
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1 egg yolk (or 1 tablespoon water or milk, but it's won't be as high or as rich)
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2 teaspoons cocoa powder
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1 tablespoon flour
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1 tablespoon mini chocolate chips
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1 tablespoon peanut butter (creamy or chunky), optional (also try Nutella, Biscoff, or any other spread)