Brown the ground beef in a large nonstick skillet over medium-high heat, breaking it into crumbles as it cooks; drain any excess grease.
Stir in the BBQ sauce, dried minced onion, brown sugar (if using), yellow mustard, and chopped pickled jalapenos (if using). Simmer the mixture for about 1 minute, then remove from heat.
Preheat the oven to 400°F (200°C). Lightly spray 10 cups of a 12-cup muffin tin with cooking spray.
Separate each biscuit into layers (each biscuit yields 2 pieces). Stretch one piece and press it into the bottom and up the sides of a muffin cup to form a shell; repeat with remaining pieces to line 10 cups.
Divide the beef mixture evenly among the biscuit-lined cups.
Top each cup with about 1/2 cup total shredded cheese divided among the 10 cups (approximately 1–2 tablespoons each).
Bake for 10 to 12 minutes, or until the biscuit edges are golden brown and the cheese is melted.
Let the cups rest for 1 minute, then run a knife around each edge to loosen and remove them from the pan.