01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan with butter or cooking spray, or line with parchment paper for easy removal.
02 - In a large mixing bowl, whisk together flour, baking powder, garlic powder, onion powder, sugar, and salt until evenly blended.
03 - Stir in shredded sharp cheddar cheese and chopped fresh parsley until combined, ensuring cheese is evenly coated with the flour mixture.
04 - In a separate bowl, whisk together whole milk, melted cooled butter, and egg until smooth and fully incorporated.
05 - Pour wet ingredients into dry ingredients. Stir gently with a spatula or wooden spoon until just combined; do not overmix as this will result in a dense loaf.
06 - Spread batter evenly into the prepared loaf pan, smoothing the top with a spatula.
07 - Bake for 35 to 45 minutes, or until a toothpick inserted into the center comes out clean and the top is golden brown.
08 - While loaf bakes, mix melted butter, garlic powder, and chopped fresh parsley in a small bowl until combined.
09 - Remove loaf from oven. While still hot, brush generously with garlic butter topping, allowing it to absorb into the crust.
10 - Let cool in pan for 10 minutes, then transfer to a wire rack. Slice and serve warm.