Preheat the oven to 450ºF. Line a baking sheet with parchment paper.
In a large bowl, whisk together the all-purpose flour, baking powder, baking soda, and kosher salt. Stir in the frozen shredded butter to evenly coat it with the flour, breaking up any large clumps.
2 cups All-purpose flour, 1 tbsp Baking powder, 1/4 tsp Baking soda, 3/4 tsp Kosher salt, 1/2 cup Frozen unsalted butter
Stir in chopped dill and shredded cheese. Make a well in the center of the flour mixture, pour in the buttermilk, and stir just until combined and a soft dough is beginning to form.
1 cup Shredded sharp cheddar cheese, 1/4 cup Finely chopped fresh dill, 1 cup Buttermilk
Pour the dough out onto a lightly floured surface and knead until the dough comes together. Pat it out into a 1-inch thick rectangle. Cut the biscuits using a 2-inch biscuit cutter. Place them almost touching on the prepared baking sheet. Place the baking sheet in the freezer for 5-10 minutes.
Bake for 12-15 minutes or until golden brown. Melt the butter, stir in 1 teaspoon of chopped dill and 1/4 teaspoon garlic powder.
1 tbsp Unsalted butter, 1/4 tsp Garlic powder, 1 tsp Finely chopped fresh dill
When the biscuits are done, while they are still hot, brush the tops with the garlic butter dill mixture. Serve warm with extra butter.