INGREDIENTS
13 oz
rhubarb
1 cup
sugar
1 cup
flour
1/2 tsp
baking powder
1/2 tsp
salt
6 tbsp
unsalted butter
1 tsp
lemon zest
1 large
egg
1/2 tsp
vanilla extract
1/4 cup
sour cream
1/2 cup
flour
2 tbsp
light-brown sugar
1/2 tsp
salt
4 tbsp
unsalted butter