INGREDIENTS
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1 1/4 c. flour
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1/4 c. cocoa
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1 tsp. baking powder
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1/2 tsp. salt
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3 eggs
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2 c. sugar
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3/4 c. butter, melted
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1 tsp. vanilla extract
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1 c. chopped walnuts (optional)
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1/3 c. butter
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2 c. confectioners' sugar (icing sugar)
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2 tbsp. milk
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1/4 tsp. vanilla extract