Using a bread knife, cut up the rolls into 12 pieces. They don’t have to be perfect.
Place the bread cubes into a sprayed 9x9 inch cake pan (or one covered in parchment).
In a large mixing bowl, combine cream, eggs, sugar, soda pop, and rum extract.
Pour this over the cubes.
Wrap the pan with plastic wrap.
Let it rest minimally for 30 minutes or refrigerate overnight before baking.
Preheat the oven to 350°F.
For the topping, combine the melted butter, oats, toffee bits, and walnuts to make the crumble topping.
Sprinkle the topping over the bread pudding. If you’d like more, simply double the recipe.
Bake for 50-60 minutes, or until a knife inserted in the pudding comes out clean.
Meanwhile, prepare the chocolate cola sauce. In a saucepot on low heat, combine the butter, cocoa, cola, powdered sugar, and rum extract.
Simmer until the sauce thickens.
Serve the bread pudding warm and topped with the cola sauce.