Place chicken breasts, chili powder, sugar, salt, onion, garlic and green pepper in your pressure cooker. Cover with 1 can cola (I used Coca-Cola).

Lock the lid and ensure the valve is closed. Pressure cook on high for 15 minutes.

When you hear the beep indicating the cooking is completed, manually release the pressure. Once pressure is released, remove the lid.

Carefully (it will be hot, use oven mitts) lift the inner pot out of the cooker and drain the liquid. Remove the chicken to a plate and use two forks to shred the meat.

Return to pot and add 1 bottle of your preferred BBQ sauce. Stir to coat the chicken. You can use the brown/sauté mode to re-heat the mixture if too much cooling has occurred while shredding. This should only take a couple minutes. Serve warm on buns!