Preheat your oven to 350°F (175°C). Grease and flour a 1 pound loaf pan or line it with parchment paper.
In a large mixing bowl, whisk together the flour, granulated sugar, baking powder, baking soda, salt, and lemon zest. Make sure all the dry ingredients are well combined.
In a separate bowl, mix together the lemon juice, almond milk, vegetable oil, and vanilla extract. Whisk until well combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix; a few lumps are okay.
Transfer the batter to the prepared cake pan and smooth the top with a spatula.
Bake in the preheated oven for about 30-35 minutes or until a toothpick inserted into the center comes out clean.
While the cake is baking, prepare the lemon drizzle. In a small saucepan, heat the lemon juice and granulated sugar over low heat until the sugar has dissolved. Set aside.
Once the cake is out of the oven, poke several holes all over the top of the cake using a toothpick or skewer. Pour the lemon drizzle evenly over the cake, allowing it to soak in.
Let the cake cool in the pan for about 15 minutes, then transfer it to a wire rack to cool completely.
Once the cake has cooled, prepare the glaze by whisking together the powdered sugar and lemon juice until smooth. Adjust the consistency by adding more powdered sugar or lemon juice if needed.
Drizzle the glaze over the cooled cake, allowing it to drip down the sides.
Let the glaze set for a few minutes before serving.