Muffin Tin Taco Bombs

In a medium bowl, beat cream cheese until nearly fluffy. Add salsa and mix to combine. Set aside.
Divide pizza dough into 12 equal portions. Working with one piece at a time, roll dough into a ball, then use fingers to flatten and stretch it into a 4-inch circle. Repeat with remaining dough.
Place some of the cream cheese mixture in the center of each dough round, and top with some of the ground beef, and the cheddar cheese. You might have leftover filling, and that's okay.
Fold edges of dough up and around the filling, then pinch together to form a bundle. Place seam side down in muffin tin and brush with melted butter.
Bake until golden brown, 15-20 minutes. Let sit until cool enough to handle. Serve with sour cream and enjoy!