Make sure all your ingredients are at room temperature.
Preheat your oven to 160C/320F (fan oven) and prepare the loaf tin by greasing it and lining with some baking paper overlapping on the sides.
Put all the dry ingredients in a large bowl and give them a whisk. Alternatively, sift them through a sieve.
Grate in zest of two lemons and mix them into the dry ingredients.
In a jug combine all the wet ingredients - soya milk, lemon juice, oil and give everything a good mix.
Pour the cake batter onto prepared loaf tin and bake in preheated oven for 50-60 minutes until nice and golden and skewer inserted into centre comes out clean.
Whilst your cake is baking prepare lemon sugar syrup by mixing together caster sugar and lemon juice, set aside.
Once cake is out of the oven poke it quite a few times with a wooden skewer and gently spoon or brush lemon sugar syrup all over it.
Leave your lemon drizzle cake to cool completely in the tin.
Once the cake has cooled down, take it out of the tin and prepare lemon icing (optional) by simply mixing icing sugar with lemon juice until you reach desired consistency.
Let the icing set, decorate with extra lemon zest, slice and enjoy!