Preheat oven to 300 degrees F. In roasting pan combine crackers, pretzels, and peanuts. In small bowl stir together melted butter, Italian seasoning, garlic, and pepper; drizzle over cracker mixture; stir to evenly coat.
Bake, uncovered, for 45 minutes, stirring every 15 minutes. Spread snack mix on large sheet of foil to cool. Store in airtight container. Makes 28 (1/2-cup) servings.