Wrap the flour tortillas in paper towels and microwave them for 1 minute to make them pliable. Set them aside.
Crumble the sausage finely into a large skillet over a medium heat and cook until brown, 5 to 6 minutes.
Add the butter to a large nonstick skillet over a medium heat. Beat the eggs in a large bowl with the salt and pepper. When the butter has melted, turn the heat to low and pour in the eggs, then add the sausage. Slowly cook the mixture, using a wooden spatula to push it around the skillet, until the eggs are totally cooked through, 8 to 10 minutes.
Place approximately 1/2 cup of the egg and sausage mixture into a warm tortilla, then roll up (do not tuck in the ends). Wrap in a foil square and keep warm until ready to serve. Repeat with the remaining ingredients.