In a skillet over medium heat, cook the ground beef until browned. Drain any excess grease, then stir in the taco seasoning and 1/4 cup of water. Simmer for 5 minutes until well combined.
Preheat your oven to 375°F (190°C). Spray a muffin tin with cooking spray. Press a wonton wrapper into each cup, then add a layer of taco meat, cheese, and a small spoonful of salsa. Place a second wonton wrapper on top and repeat the layering.
Bake for 15–18 minutes until the edges are golden brown and crispy. Remove from the oven and let them cool slightly before removing from the tin.
Top each taco cupcake with sour cream, diced tomatoes, chopped cilantro, and black olives. Serve warm and enjoy!