Creating the Chocolate Snickers Cake is a straightforward process if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, sift together flour, sugar, cocoa powder, baking powder, baking soda, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together eggs, milk, vegetable oil, and vanilla extract until well blended.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients. Mix until smooth.
5. Add Boiling Water: Carefully stir in the boiling water until fully combined. The batter will be thin.
6. Divide Batter: Pour the batter evenly into the prepared cake pans.
7. Bake: Place in the oven and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and let the cakes cool in the pans for about 20-25 minutes. Then, transfer to wire racks to cool completely.
9. Prepare Frosting: In a large bowl, beat together softened butter and peanut butter until creamy. Gradually add powdered sugar, heavy cream, and vanilla extract. Beat until smooth and fluffy.
10. Assemble Cake: Once the cakes are completely cool, place one layer on a serving platter. Spread a generous amount of peanut butter frosting on top.
11. Add Second Layer: Place the second cake layer on top and frost the top and sides of the cake with the remaining frosting.
12. Drizzle Caramel: Pour caramel sauce over the top of the frosted cake, allowing it to drip down the sides.
13. Garnish: Sprinkle chopped peanuts and chocolate shavings on top for decoration.

These steps will guide you in creating this incredible Chocolate Snickers Cake with ease!