01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - Unroll crescent roll dough and separate into 8 triangles along perforated lines.
03 - Combine shredded mozzarella, cheddar, and grated Parmesan in a small bowl until evenly blended.
04 - Place approximately 2 tablespoons of cheese mixture at the wide end of each triangle. Roll from wide end to pointed tip, sealing the filling inside.
05 - Place rollups on prepared baking sheet with the tip tucked underneath to prevent unrolling during baking.
06 - Whisk together melted butter, minced garlic, fresh parsley, and salt until thoroughly combined.
07 - Brush each rollup generously with the garlic butter mixture, ensuring even coverage.
08 - Bake for 15 to 18 minutes until deep golden brown and cheese filling is visibly bubbling.
09 - Remove from oven and brush with additional garlic butter if desired. Serve immediately while warm.