For the biscuits:

2 and 1/4 cup all-purpose flour

2 and 1/2 teaspoons baking powder

2 teaspoons sugar

3/4 teaspoon baking soda

1 teaspoon salt

6 tablespoons cold unsalted butter, cut into 1-tablespoon pieces

1 and 1/2 cups white cheddar cheese, shredded

1 cup buttermilk

1 teaspoon garlic salt

For brushing:

1/4 cup (1/2 stick) unsalted butter, melted

1/2 teaspoon garlic salt