Sweet Potato Casserole

Boil the sweet potatoes, skin on until fork tender, drain and cool. Remove skin and discard. Add sweet potatoes to a large bowl, then add the butter, brown sugar, orange juice, maple syrup, vanilla, and salt to the bowl. Mix on low speed with a hand mixer for about 15-20 seconds, then add milk a little at the time until the potatoes are smooth. Place into a rectangular baking dish. Top with mini marshmallows and pecans if desired. Bake in the oven at 375°F until the marshmallows start to brown, about 20 minutes.