Combine all of the ingredients in a large bowl and mash with a fork until fully incorporated. Place the bowl into the fridge to fully chill the butter before adding it to the red pepper sauce.
Prepare the Red Pepper Sauce
Bring the Sauce Supreme to a simmer. Whisk in the glace de viande until fully incorporated. Add the red-pepper butter, mix and reduce to desired thickness.
Taste for additional seasoning and add if necessary.
Reserve the remaining Red Pepper Butter for another meal.