Preheat the oven to 350°F and grease a 9x13 inch baking dish.
In a bowl, mix flour, baking powder, and sugar.
Add milk, vegetable oil, and vanilla extract to the dry ingredients and stir until well combined.
Fold in blueberries gently.
Pour the batter into the prepared baking dish and bake for 25-30 minutes or until a toothpick inserted comes out clean.
Let the cake cool slightly, then poke holes in it with a fork.
In a separate bowl, mix condensed milk, evaporated milk, and coconut milk.
Slowly pour the milk mixture over the cake, allowing it to soak in.
Refrigerate the cake overnight.
The next day, spread mixed berry jam over the cake.
Whip the heavy cream until stiff peaks form and spread it over the jam.
Finish by dusting cinnamon on top and garnishing with fresh berries.
Serve and enjoy!
