INGREDIENTS
1 cup
butter, softened
1/2 cup
sour ceam
1 cup
sugar
2
eggs
1/2 tsp
vanilla
2 tbsp
key lime juice (about 4 limes)
2 tbsp
key lime zest (about 2 limes)
2 3/4 cups
flour
1 tsp
baking soda
3/4 tsp
salt
1 tsp
cream of tartar
1/2 cup
butter softened
1/2 cup
shortening
4 cups
powdered sugar
salt
4 tbsp
key lime juice and zest (about 8 limes)