Valentine Cupcakes ( Lemon cupcakes)

Cupcakes:

1 box Duncan Hine's lemon supreme cake mix
1 (3.4 oz) box lemon pudding
4 large eggs
1 1/3 C water
1/3 C vegetable oil

Mix all the ingredients together till well combined ( I used a hand mixer). Divide the cake batter among cupcake liners ( I made 18 large ones by filling 3/4 of the liners). Bake at 350• C for 18 minutes.
Remove from oven and cool.

Lemon Buttercream  Frosting

Adapted from C.Taylor at food.com under the title Lemon Buttercream Frosting (From the Famous Sprinkles Cupcakes)

1 lemon zest and juice
2 sticks unsalted butter, softened
3 C powdered sugar
1 tsp vanilla extract
1/8 tsp salt

Combine butter, salt and sugar well. Then add lemon juice, zest and vanilla. Beat till fluffy for about 3 minutes.