1-First Step: Get the pan and oven ready Preheat your oven to 350°F. Grease a 9×13-inch baking pan thoroughly, then dust it lightly with flour if you want extra insurance against sticking. This matters because cortadillo has a soft crumb, and a well-prepared pan helps the cake release cleanly after baking. If you are making this for a special event, line the pan with parchment on the bottom for even easier removal. Set out all your ingredients before you begin. Room-temperature eggs and milk mix more smoothly, which helps the batter come together without overworking it. Because this cake bakes fairly fast, having everything measured ahead of time keeps the process calm and simple.

2-Second Step: Mix the dry ingredients Sift the 3.5 cups all-purpose flour into a bowl. Add the 2 tablespoons baking powder and 1 pinch salt, then whisk them together. Sifting helps break up lumps and adds a little air to the flour, which supports a lighter cake texture. Fresh baking powder matters here. If your baking powder has been open for a long time, it may not rise well, and the cake may bake up dense. A quick test is to drop a little into warm water; if it bubbles right away, it is still active.

3-Third Step: Whip the eggs, sugar, and flavoring In a large mixing bowl, combine the 6 eggs, 1.5 cups sugar, 2 tablespoons vanilla extract, and 2 tablespoons orange zest. Mix on low speed for about 2 minutes. This gives the eggs time to blend with the sugar and helps create a smooth base. The orange zest adds a fragrant lift that makes the cake taste more lively and fresh. Next, pour in the 1.5 cups cooking oil and mix for about 30 seconds. The batter should look glossy and evenly combined. If you want the traditional pale yellow tint, add 3 to 4 drops yellow food coloring at this stage. This step is optional, but it gives the cake a warm bakery style color.

4-Fourth Step: Bring the batter together Add half of the flour mixture to the wet ingredients and mix gently. Then pour in the 1.5 cups milk and mix again. Add the remaining flour mixture and stir just until smooth. The goal is a batter with no dry streaks, but it should still look light and soft. Do not over-mix the batter. That is one of the biggest secrets to keeping cortadillo fluffy. Too much mixing can build up too much gluten and make the cake firm instead of tender. Stop as soon as the ingredients are fully combined.

5-Fifth Step: Bake until golden Transfer the batter into the prepared pan and smooth the top with a spatula. Bake for about 45 minutes, or until the cake is golden and a toothpick inserted into the center comes out clean. If your oven runs hot, check it a few minutes early so the cake does not dry out. The top should feel set, and the edges may pull slightly from the pan. Your kitchen will smell amazing at this point, with vanilla and citrus filling the air. That is usually the moment everyone starts asking when dessert will be ready.

6-Sixth Step: Cool completely Remove the cake from the oven and place it on a wire rack. Let it cool fully before adding icing. This is important because warm cake can melt the frosting and make it slide off. A fully cooled cake also slices more neatly, which helps if you want tidy squares for guests or lunchbox treats. If you are short on time, let the cake rest in the pan for about 15 minutes, then lift it out carefully if possible and cool it on a rack. Just be patient here. The texture is worth the wait.

7-Seventh Step: Make the pink icing In a bowl, mix 3.5 cups confectioner’s sugar with 7 tablespoons milk and 3 drops neon pink food coloring. Stir until smooth and spreadable. If the icing feels too thick, add a tiny splash more milk. If it seems too thin, add a little more sugar. For a less sweet icing, you can reduce the sugar a bit or add a small pinch of salt. A tiny bit of citrus juice also works nicely if you want a brighter flavor. The icing should be soft enough to spread, but thick enough to stay in place.

8-Final Step: Ice, decorate, and let it set Spread the icing over the cooled cake in an even layer. While the frosting is still wet, add sprinkles if you like a festive finish. Then let the cake rest for 30 minutes before cutting. That short wait helps the icing set so the slices look clean and neat. Cortadillo is wonderful served plain, but it also looks charming on a platter with extra sprinkles or a few strips of orange zest on top. If you are serving it for a birthday, try cutting it into tidy squares and arranging them on a colorful plate.