Prepare the Batter

1. Mix the Dry Ingredients: In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
2. Combine Wet Ingredients: In a separate bowl, mix the milk, Greek yogurt, egg, vanilla extract, and melted butter until smooth.
3. Make the Batter: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix—lumps are okay!

Assemble the Poppers

1. Preheat the Pan: Heat a non-stick mini muffin pan or pancake popper maker over medium heat and lightly grease with butter or cooking spray.
2. Fill the Pan: Spoon a small amount of batter into each cavity, filling halfway.
3. Add Fillings: Add a few blueberries, chocolate chips, or your chosen filling into each cavity, then top with a little more batter.

Cook the Poppers

1. Cook on the Stovetop: Cover the pan and cook for about 3-4 minutes, or until the bottoms are golden and the tops begin to set.
2. Flip and Finish: Use a skewer or small spatula to gently flip each popper and cook for another 2-3 minutes until golden brown and fully cooked.

Cool and Serve

1. Cool Slightly: Remove the poppers from the pan and let them cool for 5 minutes.
2. Serve: Arrange on a platter and serve with maple syrup, powdered sugar, or fresh fruit.