Mix eggs, melted butter, greek yogurt, sugar, vanilla, and lemon zest together
Fold in flour and baking powder, mixing until a batter-like consistency has formed
Fold in raspberries and white chocolate chips
Pour batter into a parchment paper lined 9x5 loaf tin
Bake at 350 degrees for approximately 60 minutes, or until a toothpick inserted comes out clean
Place a piece of tin foil loosely over top of loaf about halfway through to prevent the top from burning
Remove cake and let cool completely
Top with buttercream frosting, slice, and enjoy
