Lemon-Blueberry Muffins
["2 c. all-purpose flour", "1/2 c. sugar", "1 Tbsp. baking powder", "1/2 tsp. salt", "1 1/2 c. fresh/frozen blueberries", "1 tsp. grated lemon peel", "1/2 c. sour cream", "1 egg, slightly beaten", "1/2 c. milk", "6 Tbsp. melted butter", "2 tsp. lemon juice"]
["Line 12-cup muffin pan with paper liners. Combine flour, sugar, baking powder and salt. Toss berries with 3 tablespoons of flour mixture in small bowl. Coat well."]
["flour", "sugar", "baking powder", "salt", "fresh/frozen blueberries", "sour cream", "egg", "milk", "butter", "lemon juice"]