lemon raspberry filled cupcakes

Name: lemon raspberry filled cupcakes
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 3 cups all-purpose flour (sifted); 1 tsp baking powder; 1 tsp baking soda; 1/2 tsp salt; 1 cup unsalted butter (room temperature (2 sticks)); 2 cups sugar; 4 eggs; 1 1/4 cups buttermilk; 1 1/2 tsp vanilla extract; 2 Tbsp fresh lemon juice; Zest of 1 large lemon; 2 pints fresh raspberries; ½ cup granulated sugar; 1 1/2 tsp cornstarch; 1 cup butter (softened); 4 cups confectioner’s sugar; 1/4 tsp salt; 1 tsp vanilla; 10 oz white chocolate (melted and slightly cooled); 2 Tbsp milk (more if needed)