Mixed Berry Yogurt Waffles (Soft, Fluffy, and Toddler-Friendly)

1 In a medium bowl, whisk together the egg, yogurt, milk, and melted butter (or oil) until smooth.
2 Add in the flour and baking powder (if using). Stir until just combined. Do not overmix.
3 Gently fold in the berries, making sure they are evenly distributed.
4 Preheat your waffle maker and lightly grease if needed.
5 Pour the batter into the waffle maker and cook according to your waffle maker instructions until golden and cooked through. Serve warm and enjoy!