Mix together all ingredients except butter and syrup in a medium bowl.
Melt 2 tsp. butter in a large nonstick frying pan over medium heat. Spoon batter by 1/3-cup portions into pan, making 3 or 4 pancakes at a time. Cook, turning once, until cooked through, 8 to 10 minutes. Continue making pancakes with remaining batter, adding more butter to pan for each batch. Serve with syrup and more butter if you like.