Pistachio Cake

How to make the cake: 

1. 1. Cream (mix) butter with sugar and vanilla.
   2. In 2 small bowls separate 5 egg yolks from the whites.
   3. Add egg yolks to butter mixture, mix until fluffy.
   4. In a separate bowl combine sifted flour and baking soda.
   5. Add flour to the butter mixture a little at a time alternating with the buttermilk (about 1/4 cup at a time).
   6. Add pistachio butter and pistachio nuts, mix again.
   7. In another bowl beat egg whites until you have stiff peaks.
   8. With a spatula, gently fold egg whites into the batter by making the figure 8 pattern.
   9. Spoon the batter into 3 pans evenly.
   10. Bake until light brown for 30 to 60 minutes.
   11. After they cool, place cakes on parchment and brush off crumbs (easier to ice).
   12. Assemble the cake and ice in between the layers.
   13. Ice the sides and the top of the cake until covered.
   14. Use chopped pistachios to decorate the sides.
   15. Refrigerate the cake until you are going to slice and serve!

How to make the icing:

1. 1. Beat the heavy whipping cream in a bowl until it thickens.
   2. Add powdered sugar, vanilla extract and mix well.
   3. Next mix in the pistachio butter with a spatula, folding it in carefully.
   4. You can store in your refrigerator until you are ready to ice the cake.