Hot Pepper Vinegar
Hot sauce in its simplest form
at least a dozen, a mix of red and green look best
apple cider vinegar
Cut the end and the tip off of the serrano peppers and place them in a clean sauce bottle. Tamp down the peppers slightly and fill up the bottle about 1/2 with peppers.
Mix the vinegars and bring them to a boil.
Slowly pour the vinegar into the bottle using a funnel. Fill the bottle up to an inch of the top and seal the top with a cap or cork.
Let the bottle sit at room temperature for a minimum of one week before using, but three weeks is recommended for optimal heat.
Feel free to use different hot peppers to vary the heat. Habaneros work very well for a major heat bump.