Crockpot Double Mashed Potatoes

Description:

Ingredients:

1 and 3/4ths pounds red potatoes
1 and 3/4ths pounds sweet potatoes
Seasoned salt and pepper
1/2 cup water
6 tablespoons butter, separated
2 tablespoons brown sugar, lightly packed
1/4 cup sour cream
1/3 cup whole milk, half and half, or heavy cream
heaping 1/4 teaspoon garlic powder
Optional: fresh parsley or chives, pecans