Some of the links below are affiliate links, so we may receive a commission, at no cost to you, if you make a purchase through a link. Check our Disclosure in the Privacy Policy for more info.
An Easy Lemon Flapjack Recipe
Homemade flapjacks but with a tangy twist, this lemon flapjack recipe is a breakfast (or dessert) idea that’s easy to make, simple and packed full of flavour. Find out how to make this unusual flapjack traybake, perfect for all the lemon lovers out there!

This right here isn’t your standard flapjack, it’s a classic flapjack recipe with a bit more zest. This lemon flapjack is both sweet and tangy, it’s so easy to make and requires only a few ingredients. Initially, I wasn’t quite sure if lemon in a flapjack would go well together, but after making my gooey flapjacks and chocolate flapjack recipe I decided to experiment. And I’m glad I did, the tangy lemon zest and juice in this recipe tastes so good; I keep going back for more.
Perfect for breakfast, as a dessert or an easy snack for work – they’re great for any occasion. With just a few ingredients you can make this recipe in only 30 minutes. I love to have them with a nice cup of tea, plus it’s a great alternative to Graze lemon drizzle flapjack.

Watch How To Make Lemon Flapjacks
My Top Tips
Keep your eye on the time: Try to avoid over-baking the flapjacks in the oven, just a few minutes extra can result in flapjacks that are really dry and crumbly.
Grating: When zesting, careful not to go too much into the white part of the lemon called the pith. It will add a bitterness to the flapjacks and alter the taste.
Mix Well: Make sure to mix the ingredients well at each stage, you’ll want the oats to be covered in the golden syrup mixture. This will help the flapjacks stick together and not fall apart when baked.
Leave To Cool: Leave the flapjacks to cool down completely before cutting them into squares, this helps to maintain the shape.
Prep: Prep in advance by zesting and juicing the lemon before you start making the flapjacks.

Recipe Ingredients
Below are the ingredients needed to make this lemon flapjack recipe, there’s no lemon curd at all. These 5 ingredients are quite basic and you can easily buy them online or at your local supermarket.
- Lemon: The lemon zest and juice are used. You can alter the strength of the lemon flavour by adjusting the amount of lemon used.
- Oats: Use porridge oats rather than large jumbo oats, porridge oats are smaller in texture so hold better.
- Golden syrup: This is a must for making flapjacks, I like to use this golden syrup here.
- Light Brown Sugar: Light brown sugar adds sweetness.
- Butter: You can use salted or unsalted butter.

How To Make Lemon Flapjacks
Here’s how to make lemon flapjacks step-by-step with lots of pictures, full instructions are on the recipe card at the bottom of the page. Don’t forget to check out the video as well.
Step One:


Add butter, light brown sugar, lemon zest, lemon juice and golden syrup to a mixing bowl and melt. I usually melt in the microwave over a medium to high heat. Be sure to stop constantly after every 10 seconds or so and mix each time.
You can also melt the mixture in a pan on the cooker.
Step Two:


Add the porridge oats into the melted mixture and mix together until thoroughly combined.
Step Three:
