01 - Preheat oven to 400°F. Grease a 24-cup mini muffin tin thoroughly with melted butter or nonstick cooking spray.
02 - In a medium bowl, whisk together flour, sugar, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, whisk together buttermilk, egg, melted butter, and vanilla extract until completely smooth and blended.
04 - Pour wet mixture into dry ingredients. Mix gently with a spatula or whisk until just combined—stop when flour streaks disappear. A few small lumps are normal and prevent overmixing.
05 - Gently fold in chocolate chips or blueberries if desired, distributing evenly throughout the batter.
06 - Spoon batter into prepared mini muffin cups, filling each about three-quarters full. Use a small cookie scoop or two spoons for even portioning.
07 - Bake for 8 to 10 minutes until tops are golden brown and a toothpick inserted into the center comes out clean.
08 - Let poppers cool in the tin for 2 minutes, then carefully remove. Serve warm with maple syrup, melted chocolate, or fruit preserves for dipping.