1 c each rinsed fresh or unrinsed frozen blueberries & raspberries (see notes)
Directions
Step #1 In a large bowl, baking soda, sugar, stir this together flour, baking powder, & salt.
Step #2 In another bowl, buttermilk, mix egg yolks, & butter until well mixed.
Step #3 Stir egg-yolk mixture into flour mixture just until well mixed.
Step #4 In another large bowl, with a mixer on high speed, beat egg whites until soft peaks form.
Step #5 Gently fold into batter until no white streaks remain.
Step #6 Place a nonstick griddle or a 12-inch nonstick frying pan over med-heat/flame (350°); when hot, coat lightly with butter & adjust heat to maintain temperature.
Step #7 Spoon batter in 1/3-c portions onto griddle & carefully spread into 4-inch rounds; sprinkle evenly with about 1 tbsp each blueberries & raspberries.
Step #8 Cook until pancakes are browned on the bottom & edges begin to look dry, 2 to 3 mins; turn with a wide spatula & brown other sides, 1 1/2 to 2 mins longer.
Step #9 As pancakes are cooked, transfer to baking sheets & keep warm in a 200° oven.