Raspberry Chocolate Lava Cupcakes

Raspberry Chocolate Lava Cupcakes Ingredients: 1 cup all-purpose flour 1/2 cup unsweetened cocoa powder 3/4 teaspoon baking soda 1/4 teaspoon salt 1/2 cup unsalted butter, softened 1 cup sugar 2 large eggs 1 teaspoon vanilla extract 1/2 cup buttermilk 1/2 cup boiling water 1/2 cup raspberry preserves Fresh raspberries for garnish For the raspberry buttercream: 1 cup unsalted butter, softened 3 1/2 cups powdered sugar 1/4 cup raspberry puree 1 teaspoon vanilla extract A pinch of salt Dark chocolate shavings for garnish