I use three of the large (1 lb. 13 oz.) cans of yams. Of course adjust it for your family size.
1 bag miniature marshmallows
Cut half the yams into smaller bite-size pieces into a casserole dish. Place thin pieces of butter here and there on top of the yams. Sprinkle generously with brown sugar. Cover yams with marshmallows. Repeat all layers with remaining yams, some butter, brown sugar and finishing with marshmallows.
Bake uncovered at 350 for 30-45 min. Yams should be hot and bubbly inside, but make sure the marshmallows are golden brown but not burned.
1/3 c. chopped pecans
1/3 c. coconut
1/3 c. brown sugar
3 T. flour
Mix together and add 3 T. melted butter. Spoon over canned and bite-size yams and bake as above.
I usually double the topping when I use three of the big cans of yams--I love extra topping!! Adjust for the amount you are making.