INGREDIENTS
2 1/2 cups
all purpose flour
1 tsps
baking powder
1 Tbsp
butter
3/4 cup
buttermilk
2 cups
confectioners sugar
3
eggs
1 3/4 cups
granulated sugar
1
juice of lemon
1/2 tsp
lemon oil
1
lemon zest
1 lb
rhubarb
1 tsp
sea salt
1 cup
unsalted butter