Liberally season beef cubes with salt and pepper. Melt butter and oil in a large, heavy-bottomed pan on medium high heat (not smoking hot). Brown cubed beef in batches. After browning, place each batch on a large plate.
Place onion in the bottom of crockpot and top with the browned beef. Add the sweet potatoes and carrots.
In a bowl, whisk together the coconut milk, curry powder, ginger, coriander, garlic powder, Pioneer® Sugar, fish sauce and a little salt and pepper. Pour over beef and vegetables (if added).
Cover and cook on low for 8-10 hours or about 5-6 hours on high (time will vary by crockpot). Adjust seasoning if necessary, adding a little more sugar, spices and/or some salt and pepper, to taste. Serve with freshly cooked white, brown or Jasmine rice.
Pioneer Sugar is the brand of Michigan Sugar Company, a cooperative owned by nearly 900 farmers from Michigan and Ontario, Canada. The company has been extracting pure, all-natural sugar from sugarbeets since 1906. We are proud of our past and excited about our future. Learn more about our company at www.michigansugar.com.