The Original Chex® Party Mix

3 cups Corn Chex® cereal
3 cups Rice Chex® cereal
3 cups Wheat Chex® cereal
1 cup mixed nuts
1 cup bite-size pretzels
1 cup garlic-flavor bite-size bagel chips or regular-size bagel chips, broken into 1-inch pieces
6 tablespoons butter or margarine
2 tablespoons Worcestershire sauce
1 1/2 teaspoons seasoned salt
3/4 teaspoon garlic powder
1/2 teaspoon onion powder

Directions
1. In large microwavable bowl, mix cereals, nuts, pretzels and bagel chips; set aside. In small microwavable bowl, microwave butter uncovered on High about 40 seconds or until melted. Stir in seasonings. Pour over cereal mixture; stir until evenly coated.
2. Microwave uncovered on High 5 to 6 minutes, thoroughly stirring every 2 minutes. Spread on paper towels to cool. Store in airtight container.
Oven Directions Heat oven to 250°F. In large bowl, mix cereals, nuts, pretzels and bagel chips; set aside. In ungreased large roasting pan, melt butter in oven. Stir in seasonings. Gradually stir in cereal mixture until evenly coated. Bake 1 hour, stirring every 15 minutes. Spread on paper towels to cool, about 15 minutes. Store in airtight container.

Courtesy of http://www.chex.com/recipes/RecipeView.aspx?RecipeId=6709&CategoryId=343