Prep Time: 40
Cook Time: 25
Serves: Serves: 8
Place onion rings in buttermilk in large bowl; let stand 30 minutes. Meanwhile, combine sugar, chili powder, paprika, cumin and 4 teaspoons salt in jar with shaker top; set aside.
Prepare fondue by melting butter in medium saucepan over medium heat. Stir in 2 tablespoons flour and cook , stirring constantly, until smooth and bubbly. Gradually add milk, stirring constantly until smooth and thickened. When mixture begins to bubble, stir in cheese and remove from heat. Cover to keep warm.
Preheat oil to 365°F. Drain onion rings in colander. Combine remaining flour with remaining salt and pepper. Dredge onion rings in flour and cook 1 to 2 minutes until golden. Drain on paper towels. Repeat until all onion rings are cooked. Sprinkle generously with powdered sugar mixture and serve with Mexican Cheese Fondue.