• Preheat the oven to 350F. Grease two or three 6” cake pans with butter, then dust with flour. Line the bottoms with parchment paper rounds. Set aside.
• Add the pistachios to a food processor or blender, and blend until finely ground.
• In a medium bowl, whisk together the pistachios, flour, baking powder, and salt. Set aside.
• In a separate large bowl, whisk together the milk, olive oil, sugar and vanilla extracts until well combined. If you want a more pronounced green color to the cake add natural green food coloring.
• Add the dry ingredient mixture to the wet, gently fold until just combined.
• Divide the cake batter evenly among the two prepared cake pans. I divided between 2 cake pans and then cut the cakes in half after cooling. However, I could have divided the mixture into 3 cake pans and had better results.
• Bake at 350F for 25-30 minutes, or until a toothpick inserted into the middle comes out clean.
• Remove the cakes from the oven and set on a wire rack. Allow to cool for 30 minutes before removing cakes from the pans. I prefer to then wrap my cake layers in plastic wrap and freeze until completely cooled and slightly frozen. This helps make assembling easier!

Prepare the buttercream:

• Once ready to assemble, prepare the buttercream. In the bowl of a stand mixer fitted with the paddle attachment or with a handheld mixer, beat the butter with the pistachio butter, until smooth.
• While mixing on low, add powdered sugar until fully combined. Then add the vanilla.
• Increase the speed to medium, and beat for about 5 minutes, until very light and fluffy, scraping down the sides of the bowl as needed.

Assemble:

• If needed and using a serrated knife, slice the top of one cake layer off to even. Or cut the cake layers in half for thinner layers.
• Place the cake layer cut side up on a cake stand or platter. Spread or pipe some of the buttercream in the middle, then pipe or spread some around the edges to create a border. Then, add a large spoonful of raspberry jam to the middle.
• Add the second cake layer on top (cut side down). If you are only doing 2 layers you can then decorate the cake as desired. Or continue this process until all layers are in place and then decorate the cake as desired.
• Cut and enjoy the cake!