Maine Blueberry Cake

Ingredients
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1/2 cup butter
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1 cup sugar
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2 eggs
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2 & 1/4 cups flour
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1 & 1/2 tsp baking powder
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1/2 cup milk
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1 tsp orange or vanilla extract
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1 & 1/2 to 2 cups blueberries
Method
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Cream butter and sugar; add eggs
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Add flour and baking powder alternatively with milk
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Add extract and blueberries
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Pour in 9” square pan at 375 degrees and bake 40-45 minutes