Cook the Ground Beef
Heat the olive oil in a skillet over medium heat. Add the chopped onion and garlic, cooking for about 3-4 minutes until softened and fragrant.
Add the ground beef to the skillet, breaking it up with a spoon. Cook until the beef is browned and cooked through, about 5-7 minutes.
Stir in the cumin, chili powder, paprika, salt, and pepper. Mix well to ensure the beef is evenly seasoned. Remove from heat and set aside to cool slightly.
Prepare the Filling
Once the beef mixture has cooled slightly, stir in the shredded cheddar and mozzarella cheese until well combined. The cheese will melt into the beef mixture, creating a creamy, flavorful filling.
Assemble the Empanadas
Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
Take one empanada dough disc and place a spoonful of the beef and cheese filling in the center. Be careful not to overfill, as it will make folding the empanadas more difficult.
Fold the dough in half over the filling to create a half-moon shape. Use a fork to crimp the edges and seal the empanada, ensuring the filling is securely enclosed. Repeat with the remaining dough discs and filling.
Brush with Egg Wash
In a small bowl, whisk the egg to create an egg wash. Using a pastry brush, gently brush the top of each empanada with the egg wash for a golden, glossy finish.
Bake the Empanadas
Place the empanadas on the prepared baking sheet and bake for 20-25 minutes, or until the empanadas are golden brown and crispy.
Serve
Remove the empanadas from the oven and let them cool slightly before serving. Enjoy with salsa, guacamole, or sour cream for dipping.