Twix Chocolate Layer Cake

INGREDIENTS

Chocolate cake:

2 cups

plain flour

1 cup

cocoa powder

1 tsp

baking powder

and 1/2 teaspoon baking soda

and 1/2 cup (300 grams) caster sugar

1/2 cup

brown sugar

1 cup

buttermilk

3/4 cup

vegetable oil

2 tsp

vanilla extract

large eggs, room temperature

1 cup

hot water

Caramel frosting:

1/2 cup

or 1 stick) unsalted butter, softened

and 1/2 cups (325 grams) powdered or icing sugar

1/2 cup

[url]salted caramel sauce∞http://www.sweetestmenu.com/blog/homemade-salted-caramel-sauce[/url]

Twix bars, chopped

Shortbread cookies, crumbled

Extra caramel sauce for drizzling