Chocolate Blueberry Pistachio Cake

🍫🔵𝗖𝗵𝗼𝗰𝗼𝗹𝗮𝘁𝗲 𝗕𝗹𝘂𝗲𝗯𝗲𝗿𝗿𝘆 𝗣𝗶𝘀𝘁𝗮𝗰𝗵𝗶𝗼 𝗖𝗮𝗸𝗲🍫🔵

Chocolate cake frosted with chocolate buttercream, topped with blueberry preserves, and garnished with pistachios!