Preheat oven to 350°F. Grease the interior of an 8 inch round springform cake pan. Line the bottom with parchment paper.
In a large bowl, add flour, baking powder, sugar. Whisk vigorously with a whisk until evenly combined.
Add water, oil, vanilla and lemon zest (is using). Whisk until batter is smooth and no lumps remain.
Pour cake batter into the prepared cake pan. Bake for about 40-45 minutes or until the surface of the cake is a light golden brown and toothpick inserted comes out clean. Let cake cool before slicing and serving. You can dust cake with powdered sugar if desired.
You can make this in an 8 inch or a 9 inch cake pan. Do not use a pan smaller than 8 inches because the cake will be too thick. If you are using a 9 inch pan, your cake will be much thinner and will likely require less baking time.
The is a very simple basic cake recipe and won't have much flavor on its own. The lemon zest does help add flavor. You can also add cinnamon for a cinnamon version, espresso powder for a coffee version or orange zest instead of lemon zest.
Measurements are in US cups.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.