Tipsy Sweet Potatoes

2½ cups cooked, mashed, sweet potatoes
4 tablespoons butter, softened
½ cup firmly packed light brown sugar
Pinch of salt
1/3 cup Jack Daniels whiskey
Pecan halves for topping

Combine all ingredients except the pecans. Spoon mixture into a greased 1 quart casserole dish. Top with pecans and bake for 20-25 minutes in a preheated 325º oven.