I have a lot of serrano peppers growing right now. I don't use them in any of my breads, but I do use them in butter:
Life is too short for boring bread.
It's also too short for boring butter.
2 Tablespoons vegetable oil
1/2 stick butter
1/4 teaspoon onion powder
1/4 teaspoon garlic powder
1 head roasted garlic (45 mins at 350 degrees)
1 tablespoon chopped fresh chives
2 or 3 seeded and chopped serrano peppers
Soften butter in microwave for 15 to 20 seconds
Dump all in chopper/food processor
Run at high speed until blended
You can use fresh habaneros or other hot peppers, depending on your tastes and resistance to pain.