Preheat the oven to 400 degrees. In a medium bowl, whisk together the flour, sugar, baking powder, ranch seasoning, and salt.
1 1/2 cups 195 g all purpose flour, 1 Tablespoon granulated sugar, 2 teaspoons baking powder, 1 packet ranch seasoning (2 Tablespoons), 1/4 teaspoon Morton kosher salt*
In a separate large bowl, whisk together the milk, sour cream, melted butter, and egg until well combined.
1/2 cup (118 ml) milk, 2/3 cup (160 g) sour cream, 1/4 cup (4 Tablespoons; 57 g) unsalted butter, melted, 1 large egg
Pour the dry ingredients into the milk and egg mixture. Fold until most of the flour has absorbed.
Add the cheese and chives. Fold until just combined. Optional: Allow the batter to rest for 30 minutes at room temperature before baking.
6 ounces (1 1/2 cups) sharp cheddar cheese, shredded, 1/4 cup thinly sliced chives*
Grease a mini muffin pan with nonstick spray or line the pan with muffin liners. Fill each muffin cup to the top with about 2 Tablespoons of batter. There should be enough to fill all 24 muffin cups.
melted butter for brushing, optional
Bake for 12-15 minutes or until golden brown. Allow the muffins to cool in the pan on a wire rack for about 5-10 minutes before removing.