4 cups crispy rice cereal squares (such as Rice Chex™)
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4 cups crispy wheat cereal squares (such as Wheat Chex™)
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4 cups crispy corn cereal squares (such as Corn Chex™)
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4 cups toasted oat cereal (such as Cheerios™)
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1 pound mixed nuts
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1 (12 ounce) package thin pretzel sticks
Instructions
Preheat the oven to 250 degrees F (120 degrees C).
Melt butter, Worcestershire, garlic salt, and celery salt over low heat in a medium saucepan until butter has melted, 3 to 5 minutes.
Combine rice cereal, wheat cereal, corn cereal, oat cereal, mixed nuts, and pretzel sticks in a large mixing bowl. Pour butter mixture over and gently stir until evenly coated. Transfer mixture to a large roasting pan.
Bake in the preheated oven until golden, about 2 hours, stirring gently every 15 minutes.
Remove from the oven and let cool completely, about 1 hour. Store in airtight containers.