01 -
Preheat the oven to 175°C. Grease and flour two 23-cm round cake pans to prevent sticking.
02 -
In a large mixing bowl, cream the softened butter with granulated sugar until the mixture is light and fluffy, about 3-4 minutes.
03 -
Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next. Stir in melted butterscotch chips and vanilla extract until well combined.
04 -
In a separate bowl, whisk together all-purpose flour, baking powder, baking soda, and salt for even distribution.
05 -
Gradually add the dry mixture and buttermilk to the butter mixture, beginning and ending with dry ingredients. Mix until just combined to avoid over-mixing.
06 -
Divide batter evenly between the prepared pans. Smooth the tops and bake for 25-30 minutes, or until a toothpick inserted in the centre comes out clean.
07 -
Cool cakes in pans for 10 minutes, then turn out onto wire racks to cool completely.
08 -
Beat softened butter until creamy. Gradually add powdered sugar, alternating with butterscotch sauce and heavy cream. Beat until the frosting is light and fluffy. Stir in vanilla extract.
09 -
Combine chopped pecans, crushed pretzels, brown sugar, and melted butter in a bowl. Spread onto a baking sheet and bake at 175°C for 8-10 minutes, until golden brown. Cool completely.
10 -
Place one cooled cake layer on a serving plate. Spread a layer of butterscotch frosting on top. Place the second layer on top and use remaining frosting to cover the top and sides.
11 -
Sprinkle cooled crunch topping over the frosted cake, pressing gently to adhere.
12 -
Chill cake in refrigerator for at least 30 minutes to set the frosting before slicing and serving.