Lay the chicken breasts out on a large cutting board.
Cut each breast in half horizontally, so that you have 2 cutlets from each breast (6 total).
In a large bowl, whisk together the olive oil, both mustards, honey, Cajun seasoning, and garlic powder.
Add the chicken to the bowl and stir to coat well.
Heat the butter and olive oil in a large skillet over medium heat.
Add the chicken to the skillet and sear each side for 5-7 minutes until golden.
Remove the chicken from the pan and serve immediately. Store any leftovers in an airtight container in the refrigerator for up to 3 days.
Notes
NOTE ON MARINADE: If desired, you can marinate this chicken longer. Whisk the marinade ingredients together, pour into a large zip-top plastic bag, add the chicken. Seal the bag and rub the marinade around the chicken to coat. Refrigerate for up to 24 hours before cooking.NOTE ON CHICKEN: If desired you can use chicken thighs for this recipe. I recommend using boneless/skinless to keep it a stovetop recipe. If using bone on/skin on thighs, you will need to preheat your oven to 425 degrees. Sear the chicken for 2-3 minutes per side, then transfer to the oven and bake for 20-25 minutes until cooked through (temp of 165 degrees).