In a large mixing bowl, whisk together the dry ingredients: flour, sugar, baking powder, baking soda, and salt until no lumps remain.

In a separate bowl, blend the wet ingredients: milk, egg, melted butter, and vanilla extract until creamy and slightly frothy.

Slowly pour the wet mixture into the dry mixture, gently folding together until combined; some lumps are acceptable.

Preheat your oven to 350°F (175°C) and grease the mini muffin pan with cooking spray or butter.

Spoon the batter into each muffin cavity, filling them about two-thirds full, and bake for 10-12 minutes.

Let the Poppers cool for a few minutes, then gently pop them out of the tin and serve warm with your favorite toppings.