Preheat the oven to 375℉. Lightly spray a muffin pan with nonstick cooking spray (a regular-size muffin cups muffin tin with 12 spots in it). You will only need to spray 8 of the muffin cups.
In a large skillet pan, over medium-high heat, cool and crumble the ground beef until it's no longer pink. Drain the excess fat and grease from the pan.
1 pound lean ground beef
Add the sloppy joe sauce to the skillet and stir until the beef is fully coated. Let the sloppy joe mixture simmer for 5 minutes or until slightly thickened.
1 can (15 oz) sloppy joe sauce
On a lightly floured surface, unroll the crescent dough and pinch the seam together to form a single large square of dough. Using a rolling pin, roll the dough evenly to smooth the seams and slightly enlarge the square.
1 tube (8 oz) refrigerated crescent rolls
Cut the dough into 8 equal squares. Gently press each square into a muffin cup to form open-faced cups.
Spoon the sloppy joe filling evenly into each dough cup. Top each cup with a quartered slice of American cheese.
2 slices yellow American cheese
Bake for 12-15 minutes, or until the dough is golden brown and cooked through, and the cheese is melted and slightly bubbly.
Allow the cups to cool for a few minutes before removing them from the muffin pan. Serve warm and enjoy!