Blueberry Muffins

1/2 c. butter
1 c. sugar
2 large eggs
1 tsp. vanilla
2 c. flour
2 tsp. baking powder
1/2 tsp. salt
1/2 c. milk
2 c. fresh/frozen (partially thawed) blueberries

Beat butter until fluffy. Add sugar and mix well. Stir in eggs and vanilla. In separate bowl mix flour, baking powder and salt. Add half the flour mixture to the butter mixture and mix well. Stir in half the milk, then the rest of the flour, and then the remaining milk, mixing just enough to combine. Gently fold in blueberries. Fill 12 greased or lined muffin cups with mixture and bake at 375 for 25-30 minutes (until golden).