1. Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
2. In a large mixing bowl, cream together the butter and sugar until light and fluffy, about 3-4 minutes. This was always my favorite step as a child, sneaking spoonfuls of sugar when Abuela wasn’t looking!
3. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
4. In another bowl, combine the flour, baking powder, and salt. Gradually add these dry ingredients to the creamed mixture alternately with the milk, starting and ending with the flour mixture. Mix just until combined.
5. Gently fold in the blueberries and lemon zest, taking care not to crush the berries.
6. Pour the batter into the prepared baking dish, smoothing the top with a spatula.
7. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
8. Let it cool in the pan for 10 minutes before transferring to a wire rack to cool completely. Serve warm or at room temperature.

Cooking is like storytelling; it’s not just about the ingredients but how they come together. Each step is a page in a story that you, the chef, get to write.