01 -
Preheat the oven to 350°F (175°C). Spray a 9x9x3” or 9x11x3” deep baking dish with nonstick baking spray. If using a larger dish, adjust the baking time accordingly and check for doneness with a toothpick.
02 -
In a large mixing bowl, cream together the granulated sugar, brown sugar, and butter for about 3 minutes until light and fluffy. Mix in the eggs, vanilla extract, buttermilk, maple syrup, and mashed bananas until well combined.
03 -
In a separate bowl, whisk together the gluten-free flour (or all-purpose flour), baking powder, baking soda, kosher salt, and ground cinnamon.
04 -
Gradually add the dry ingredients to the wet mixture, stirring until just combined. Avoid overmixing.
05 -
Pour the batter into the prepared baking dish and bake for 45-55 minutes. Check for doneness with a toothpick inserted into the center of the cake; it should come out clean. The cake should be dense and moist.
06 -
While the cake is baking, prepare the toffee sauce. In a medium stock pot over medium-low heat, melt the butter and brown sugar, stirring frequently. Cook for 10 minutes until smooth. Stir in the heavy cream and vanilla extract, then cook for an additional 5 minutes without boiling. Remove from heat and let cool in a glass container.
07 -
Once the cake has cooled slightly, poke holes all over the top with a toothpick. Pour the cooled toffee sauce evenly over the cake, allowing it to soak for at least 1 hour.
08 -
Slice the cake and serve with extra toffee sauce if desired.