Preheat the oven to 350 F.
Combine the melted butter and garlic. Brush the muffin tins with the garlic butter (including some of the chopped garlic). Reserve the rest of the garlic butter.
Whisk together the flour, baking powder, baking soda, and salt in a medium-sized bowl.
In a separate bowl, mix the milk, egg, sour cream, oil, parsley, dry minced onion, and garlic.
Pour the wet ingredients into the dry and mix with a wooden spoon, just until combined. Do not overmix. A few lumps are ok.
Carefully fold in the shredded cheddar cheese. Do not overmix.
Divide the batter evenly between the muffin tins and bake for 23-25 mins, or until golden and firm to the touch. Remove from the oven.
Divide the batter evenly between the muffin tins and bake for 23-25 mins, or until golden and firm to the touch. Remove from the oven.