First, warm up your oven to 350°F (175°C). Grab a baking dish and lightly grease it to make sure nothing sticks.
In a big bowl, beat the soft butter with the sugar until the mixture looks light and fluffy. Then, add the eggs one by one, mixing well after each, and stir in the vanilla extract until everything is smoothly combined.
In a separate bowl, whisk together the flour, baking powder, and cocoa powder.
Gradually add the dry mix to your wet ingredients, alternating with splashes of milk. Mix gently until just combined – be careful not to overmix to keep your treats tender!
Pour your delicious batter into the prepared baking dish and smooth the top. Bake for about 25 to 30 minutes, or until a toothpick inserted in the middle comes out clean.
Let your wonderful desserts cool in the dish for about 10 minutes to firm up. Then, carefully move them to a wire rack to cool completely. Once cool, feel free to add a light, healthy frosting or some fresh berries for a beautiful Valentine's touch!