Beef Taco Roll-Ups

Preheat oven to 350 degrees F. On a floured work surface, roll out crescent rolls into one large rectangle, pinching together seams. In a large skillet over medium-high heat, cook ground beef until browned and cooked through. Transfer to a paper towel-lined plate and soak up fat. Spread sour cream all over Crescent rectangle, then scatter with cooked beef, scallions, pepper jack, and cheddar. Starting from the bottom, tightly roll up the rectangle like a cinnamon roll, then slice into four rolls. Transfer to a glass baking dish and bake until puffed and golden, 15 to 20 minutes.