Hazelnut Cake With Praline And Milk Chocolate Buttercream Frosting

Ingredients

• 1/4 cup whole hazelnuts
• 3/4 cup sugar
• 9 tablespoons cake flour
• 6 tablespoons cornstarch
• 3 large eggs, at room temperature
• 3 large egg yolks, at room temperature
• 3/4 teaspoon coarse salt
• 1 tablespoon almond extract
• 3/4 cup vegetable oil
• 5 large egg whites
• 1 1/3 cups sugar
• pinch of coarse salt
• 1 pound unsalted butter, firm but not chilled, cut into cubes
• 1/2 teaspoon pure vanilla extract
• 8 ounces milk chocolate, finely chopped
• 2 tablespoons dutch-processed unsweetened cocoa powder mixed with 2 tablespoons water
• 1/4 cup praline paste