Cook spaghetti in a large saucepan of boiling water for 8 minutes or just until spaghetti is tender. Drain spaghetti, reserving 1/2 cup cooking water.
Melt butter in a large skillet over medium heat. Add 3 Tbsp. Chili Pepper Crunch Sauce; cook and stir for 30 seconds or until heated through.
Add spaghetti and reserved cooking water to sauce in skillet; mix lightly. Cook and stir for 2 minutes. Remove skillet from heat.
Drizzle spaghetti mixture with remaining Chili Pepper Crunch Sauce.