Preheat the oven at 160ºC/320ºF conventional oven and prepare a 21,5 x 11,5 cm /8,5x4,5 inch loaf pan with parchment paper. Have enough baking paper on each side of the pan, so you are able to lift the loaf cake out of the pan.
In a mixing bowl add the granulated sugar and lemon zest. Rub it together to release all of the lemon zest flavor, until it looks like wet sand.
330 g granulated sugar, Zest of 2 large lemons
Add the eggs and with a hand whisk, whisk until combined. Then pour in the heavy cream, and whisk until combined.
4 large eggs, 160 g heavy cream
Place a sieve onto the bowl and sift the all-purpose flour, baking powder and salt into the batter.
240 g all-purpose flour, 1 teaspoon baking powder, ½ teaspoon salt
Then pour in the vegetable oil, vanilla extract and lemon juice and gently stir it together until smooth and combined.
85 g vegetable oil, 1 ½ teaspoon vanilla extract, 1 ½ tablespoon lemon juice
Pour the cake batter into the prepared loaf pan. Take a butter knife and insert it into the top of the batter in the loaf pan and run it a straight line down the middle of the batter. Bake it for 75-90 minutes or until a cake tester or toothpick comes out clean.
Note: If the baking is larger or smaller loaf pan, it can affect the baking time, therefore bake it until a cake tester or tooth pick comes out clean.
Let the loaf cake cool on a cooling rack. After 10 minutes, gently remove the loaf cake from the cake tin and let it cool down completely.