Whisk together the Dr Pepper, hot sauce and brown sugar in a small saucepan over medium-high heat. Bring to a boil then reduce heat to a simmer and simmer, stirring often, for 30 minutes or until the sauce has reduced by half.
Combine the cornstarch with 1 tablespoon water and slowly whisk into the sauce.
Bring back to a simmer and stir for 2 minutes.
Remove from heat and let cool slightly before saucing your wings.