Step 1: Prepare the Biscuits

1. Preheat the Oven
   Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
2. Mix the Dry Ingredients
   In a large mixing bowl, combine the flour, baking powder, and salt. Whisk to blend the dry ingredients thoroughly.
3. Cut in the Butter
   Add the cold, cubed butter to the dry mixture. Use a pastry cutter or your fingers to work the butter into the flour until it resembles coarse crumbs. The butter should be in pea-sized pieces, which will help create flaky layers in the biscuits.
4. Add the Milk
   Pour in the milk or buttermilk and gently stir until just combined. Be careful not to overmix; you want to keep the dough light and airy.
5. Shape the Biscuits
   Turn the dough onto a lightly floured surface and gently knead it 2-3 times to bring it together. Pat it into a 1-inch-thick rectangle. Use a round cutter or glass to cut out biscuits, or cut the dough into squares if you prefer.
6. Bake
   Place the biscuits on the prepared baking sheet, positioning them close together for softer edges or spaced apart for crisper edges. Bake in the preheated oven for 10-12 minutes, or until the tops are golden brown.

Step 2: Make the Chorizo Gravy

1. Cook the Chorizo
   In a large skillet, cook the chorizo over medium heat until browned and fully cooked, breaking it up with a spoon as it cooks. This should take about 5 minutes. Once done, use a slotted spoon to transfer the chorizo to a plate lined with paper towels to drain excess grease.
2. Melt the Butter
   In the same skillet (leaving a bit of the chorizo drippings), add the butter. Once melted, sprinkle in the flour. Whisk constantly to form a roux, cooking for about 1 minute to eliminate the raw flour taste.
3. Add the Milk
   Slowly pour in the milk, whisking constantly to avoid lumps. Continue to whisk until the mixture is smooth and begins to thicken, about 3-5 minutes.
4. Season the Gravy
   Add the cooked chorizo back into the skillet, along with the salt, black pepper, smoked paprika, and red pepper flakes if desired. Stir well to combine all ingredients and let the gravy simmer for another 2-3 minutes until it reaches your desired consistency.
5. Taste and Adjust
   Taste the gravy and adjust seasoning if necessary. If it’s too thick, thin it out with a bit more milk.

Step 3: Serve and Enjoy

1. Plate the Biscuits
   Place two warm biscuits on each plate.
2. Spoon the Gravy
   Generously spoon the chorizo gravy over the biscuits.
3. Garnish
   Sprinkle with freshly chopped parsley for a burst of color and freshness.
4. Serve hot and enjoy this hearty, spicy breakfast dish!