In the bowl of a stand mixer, beat the butter, sugar and jam on high speed until light and fluffy, about two minutes.
Making sure the cake layers are completely cooled, place the first layer on a cake board or cake plate, using a dab of coffee buttercream to adhere. Using a serrated knife, trim off any dome that may have formed (save for snacking.) Add a generous dollop of coffee buttercream and spread over the layer using an offset spatula. Evenly sprinkle a large handful of toffee bits on top and gently press down into the buttercream.
Trim the second layer as needed and place cut-side-down on top of the first layer, pressing gently to adhere. Spread a generous amount of strawberry buttercream on top of the layer, again adding the toffee bits.
Add the final trimmed cake layer, cut-side-down, on top of the strawberry buttercream, pressing gently to adhere.
Using the coffee buttercream, frost the the entire cake using your offset spatula. Use a cake smoother to smooth the sides and top if desired. Chill the cake in freezer for ten minutes to set the buttercream.
Add a final coat of coffee buttercream to the cake, smoothing to your desired finish.
Using a piping bag fitted with your favourite open star tip, pipe the entire top of the cake with strawberry buttercream drop stars. Add larger angular toffee bits on top as decoration, as well as freeze dried strawberries, sprinkles and edible tea flowers, if desired!
Serve cake at room temperature. Leftovers can be refrigerated in an airtight container for three days, bring to room temperature before enjoying!