1 box (12 ounces) Crispix cereal
1/2 pound pecan halves
1/2 can (11 ounces) deluxe mixed nuts
1 cup small pretzel rings
1 cup cheese crackers (such as cheez-it crackers)
1 cup (2 sticks) butter
1/2 cup light corn syrup
2 cups light brown sugar
1/2 teaspoon baking soda
pinch cream of tartar
Heat oven to 300 degrees F. Spray two baking sheets with nonstick cooking spray.
In a medium-size saucepan, melt the butter over medium-low heat. Stir in the corn syrup and brown sugar. Cook mixture for 5 minutes, stirring continuously. Take off heat and stir in the baking soda and cream of tartar.
Carefully pour hot mixture over cereal, stirring with a wooden spoon to coat all ingredients. Divide mixture evenly over both baking sheets. Bake at 300 degrees F for 15 minutes, stirring twice.
Let mixture cool on baking sheets and break apart. Store in plastic bags or sealed containers.