Combine melted butter and oil in a large bowl. Pour cormeal and seasonings into a large plastic zippered bag. Shake bag a few times to combine.
Add the cut potatoes to the bowl with the butter and oil. Toss to coat. Transfer a portion of the potatoes with a slotted spoon to the plastic bag. Shake to coat and place potatoes on a cookie sheet. Repeat until all of the potatoes are coated.
Bake potatoes at 375 degrees for 25-35 minutes, until fork tender inside but crispy on the outside. Enjoy!