Melt butter in large skillet over Med to Med-High heat.
Add cubed sweet potatoes and drizzle oil. Toss to coat evenly with butter and oil. Let the sweet potatoes brown on one side for about 3-5 minutes.
Flip sweet potatoes over, cover with lid and lightly brown the other side for another 3-5 minutes or until softened but not mushy.
Reduce heat to Low to Low-Med heat, remove lid and toss sweet potatoes with spatula for a about 3 minutes or to desired crispiness.
Serve as a side with just about anything!