Whisk egg, milk and 1 Tbsp. oil in medium bowl until blended. Stir in flour mixture.
Heat griddle or large skillet, brushed lightly with some of the remaining oil, on medium heat.
Pour batter onto griddle, using 1/4 cup batter for each pancake. Immediately sprinkle 2 Tbsp. blueberries over batter for each pancake; cook until bubbles form on tops, then turn to brown other sides.
Serve topped with remaining berries and COOL WHIP.