Rolled-up grilled cheese

8 slices white bread, crusts removed
8 slices medium cheddar cheese
(about .75 ounces each)
Toothpicks
2-4 tablespoons butter, cubed
  and divided

    Flatten bread slices to 1/4-inch thickness; top each with cheddar. Roll up tightly. Secure with toothpicks as needed. Melt 2 tablespoons butter in a large skillet over medium heat. Cook roll-ups, in batches, for 3-4 minutes, turning until sides are golden brown. Add remaining butter as necessary. Serve immediately.