01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease each cavity thoroughly.
02 - In a large mixing bowl, blend the flour, baking powder, baking soda, sugar, and salt using a whisk.
03 - Fold in the grated cheddar, diced jalapeños, and chives into the dry mixture. Toss gently to ensure even distribution.
04 - In a separate bowl, whisk together melted butter, whole milk, and eggs until fully combined and smooth.
05 - Pour the wet mixture into the dry ingredients. Stir with a spatula until just incorporated, taking care not to overmix.
06 - Portion the batter evenly into the 12 prepared muffin cups.
07 - Gently press a wooden popsicle stick into the center of each batter-filled cup, pushing halfway down.
08 - Bake for 16 to 18 minutes, or until muffins are golden and a toothpick inserted in the center emerges clean.
09 - Remove from oven and immediately brush muffin tops with melted butter. Add sprinkles or chopped chives if desired.
10 - Let cool in tin for 5 minutes, then transfer to a wire rack to cool completely. Serve on popsicle sticks.