Creating the Fruity Sangria-Soaked Cake Dessert is simple when you follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, and salt.
3. Cream Butter and Sugar: In another bowl, beat the softened butter and sugar until light and fluffy.
4. Add Wet Ingredients: Add the eggs and vanilla extract to the butter mixture, mixing until combined. Gradually add in the milk, blending until smooth.
5. Combine Mixtures: Slowly add the dry ingredients to the wet mixture, mixing until just combined. Avoid overmixing.
6. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
7. Bake: Place in the preheated oven and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
8. Cool the Cake: Remove the cake from the oven and let it cool in the pan for about 15-20 minutes. Then, transfer it to a wire rack to cool completely.
9. Prepare Sangria Soak: In a bowl, combine the red wine, orange juice, brandy (if using), and sugar. Stir until the sugar is dissolved.
10. Soak the Cake: Once the cake has cooled, poke holes all over the surface with a fork. Pour the sangria mixture over the cake, allowing it to soak in for at least 30 minutes.
11. Prepare Toppings: While the cake is soaking, prepare the mixed fruits for topping.
12. Serve: When ready to serve, cut the cake into squares and top with whipped cream and extra mixed fruits for garnish.

These steps will guide you in creating this incredible dessert effortlessly while ensuring a delightful experience for everyone.