Wash hands with warm, soapy water for 20 seconds.
Preheat oven to 350°F
Whisk olive oil, Worcestershire sauce, hot sauce, garlic powder, cumin, onion powder, cayenne, and salt in a bowl.
Combine the cereals, pita chips, and pepitas in a bowl.
Toss cereals with the spice mixture and spread evenly on a baking sheet.
Bake, stirring occasionally, until golden, 20 to 40 minutes.