Chocolate and Nut Layer Cake with Creamy Vanilla and Buttercream: A Decadent Delight

Introduction
Indulge in the ultimate dessert experience with this Chocolate and Nut Layer Cake, a masterpiece of rich, moist chocolate cake layers, complemented by a luscious creamy vanilla filling and topped with silky buttercream frosting. This cake is perfect for any celebration or just to satisfy a sweet tooth. The addition of nuts adds texture and flavor, making each bite a delightful combination of smooth, crunchy, and chocolatey goodness.

Ingredients:
For the Chocolate Cake Layers:

2 cups all-purpose flour
1 1/2 teaspoons baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
3/4 cup cocoa powder (unsweetened)
1 1/2 cups granulated sugar
2 large eggs
1 cup whole milk
1/2 cup vegetable oil
2 teaspoons vanilla extract
1 cup hot water
For the Creamy Vanilla Filling:

1/2 cup heavy cream
1/2 cup whole milk
1/4 cup granulated sugar
1 tablespoon cornstarch
1 teaspoon vanilla extract
For the Buttercream Frosting:

1 cup unsalted butter (softened)
4 cups powdered sugar
1 teaspoon vanilla extract
2-3 tablespoons heavy cream or milk (adjust for consistency)
Pinch of salt
For the Nut Layer:

1/2 cup chopped mixed nuts (such as walnuts, pecans, or almonds)
How to Make:
Prepare the Cake Layers: