1In large bowl, stir Bisquick mix, milk, oil and egg until well blended. Stir in sour cream; gently fold in blueberries.
2Heat griddle to 375°F or 12-inch skillet over medium-high heat. (To test griddle, sprinkle with a few drops of water. If bubbles jump around, heat is just right.) Grease griddle with vegetable oil if necessary (or spray with cooking spray before heating).
3For each pancake, pour 1/4 cupfuls of batter onto hot griddle. Cook pancakes until dry around edges. Turn and cook other side until golden brown. Serve with butter.