Prepare the Biscuit Dough

1. Preheat Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Mix Dry Ingredients: In a large mixing bowl, whisk together the flour, baking powder, salt, and garlic powder.
3. Cut in the Butter: Add the cubed cold butter to the dry ingredients. Use a pastry cutter or your fingers to work the butter into the flour until the mixture resembles coarse crumbs with pea-sized pieces of butter.
4. Add Cheese and Corn: Stir in the shredded cheddar cheese and corn kernels until evenly distributed.
5. Add the Milk: Pour in the milk and gently stir until the dough just comes together. Be careful not to overwork the dough.

Shape and Bake the Biscuits

1. Form the Biscuits: Turn the dough out onto a floured surface and gently knead it 2-3 times. Pat the dough into a 1-inch thick rectangle. Use a biscuit cutter or a glass to cut out the biscuits.
2. Arrange on Baking Sheet: Place the biscuits onto the prepared baking sheet, spacing them about 1 inch apart.
3. Bake: Bake in the preheated oven for 20-25 minutes, or until the biscuits are golden brown on top.
4. Cool: Remove the biscuits from the oven and let them cool slightly before serving.