Three Layer Chocolate Cake with Salted Caramel Buttercream

Name: Three Layer Chocolate Cake with Salted Caramel Buttercream
Prep time: 45 min
Cook time: 45 min
Total time: 1 h 30 min
Cuisine: American
Ingredients: 2 cups granulated sugar; 1 3/4 cups all purpose flour; 3/4 cup unsweetened natural cocoa powder; 1 tsp fine sea salt; 1 1/2 tsp baking powder; 1 1/2 tsp baking soda; 2 large eggs (lightly beaten); 1/2 cup canola oil; 1 cup whole milk; 2 teaspoons instant espresso powder; 1 cup boiling water; 2 tsp light corn syrup; 4 tbsp water; 1/2 cup granulated sugar; 1/2 cup cream; 1 tsp vanilla; 1 tsp lemon juice; 2 sticks butter (softened); 4 cups powdered sugar; Maldon salt