Merle's Bourbon Sweet Potatoes

Made Granny's sweet potato recipe for an English department Thanksgiving get together last night and the reviews were: "These taste like dessert!" and "Have you tried Kate's deliciousness?"
I think they were a hit!

BOURBON SWEET POTATOES

2 (29 oz.) cans sweet potatoes, drained and mashed
3/4 c. finely packed brown sugar
1/2 c.  butter, melted
1/4 c. bourbon
1/2 t. vanilla
2 c. mini marshmallows

Combine first five ingredients, mix well, and spoon into a 1 1/2 qt. casserole. (I did not mash mine first. I just beat it all in a big bowl with an electric mixer til it was combined.) Refrigerate, cover, 8 hours or overnight. Bake uncovered at 350 degrees 25 minutes. Top with marshmallows and bake 7 minutes more.