Preheat the oven: Begin by preheating your oven to 180 °C (350 °F). This ensures that your cake bakes evenly and thoroughly.
Mix dry ingredients: In a large mixing bowl, combine the cornmeal, sugar, and wheat flour. Give them a good whisk to blend them together.
Add wet ingredients: Pour in the oil and crack in the eggs. Mix everything well until you achieve a smooth consistency.
Incorporate milk: Gradually add the milk while stirring constantly. This step is crucial for creating a homogeneous mixture.
Final touches: Sprinkle in the baking powder and mix gently until just incorporated. Be careful not to over-mix!
Prepare for baking: Grease and flour a mold or cake pan to prevent sticking. Pour the batter into the prepared mold, smoothing the top with a spatula.
Bake: Place your cake in the preheated oven and bake for about 40 minutes, or until it turns golden and feels firm to the touch. A toothpick should come out clean when inserted into the center.
Cool and serve: Once baked, let the cake cool for a few minutes in the pan before transferring it to a wire rack. Serve warm or at room temperature, as desired.