Blueberry Flapjacks

Blueberry flapjacks are an absolute treat. These chewy oat bars are packed with juicy blueberries and a hint of zesty lemon, creating the perfect balance of sweetness and freshness. Ideal for a quick snack or a boost of energy, they’re easy to make and even easier to love!

I love making flapjacks. 

They are easy and fairly healthy (or at least you can tell yourself that), and the flavours you can add are endless. 

Blueberry flapjacks are especially popular in our house, and I generally prefer fruity sweet treats to chocolatey (even though I love chocolate!). 

So, this recipe is definitely a favourite!

Why I Love Blueberry Flapjacks

I love blueberry flapjacks because:

• The bursts of fresh blueberries are really tasty and refreshing. 
• You can have them for breakfast. They aren’t exactly a healthy breakfast, but oats and blueberries are a good start!
• They are delicious.
• You only need six ingredients. 
• Flapjacks are always great for baking with kids.

Ingredients For Blueberry Flapjacks

When I make flapjacks with blueberries, I use:

Oats – I use regular porridge oats, which you might also know as rolled oats or old-fashioned oats. I don’t recommend jumbo, steel cut, or instant. 

Caster Sugar

Golden Syrup

Butter – I use unsalted, but it doesn’t really matter. You can use margarine if you prefer. 

Lemon – You just need the zest, so it has to be fresh and unwaxed. You don’t strictly need this, but lemon blueberry flapjacks are lovely. 

Blueberries 

You’ll Also Need

I bake my flapjacks in a square cake tin or brownie tin lined with reusable baking paper. 

My brownie tin (which is the basis of this recipe) is 10 inches by 8 inches, and my cake tin is 8 inches square. 

They are thicker when I bake them in my cake tin, so they take about 5 minutes longer to cook. 

I also cut them into squares to make up for the extra thickness. 

In addition to my brownie tin (affiliate link), I use a mixing bowl, wooden spoon, and small saucepan. 

How to Make Blueberry Flapjacks – Step-by-Step Instructions

Full, easy-to-follow instructions and quantities are available in the recipe card at the bottom of this post.

Step One

Preheat the oven to 180 degrees C (fan-assisted) and prepare a baking tin by greasing or lining. 

My tin is 10 x 8, and my flapjacks are pretty thin.

Step Two

Mix the oats, blueberries and lemon zest in a large mixing bowl. 

Step Three

Carefully melt the butter, sugar, and syrup in a small saucepan over low heat on the hob, stirring constantly until the butter has melted completely. 

Don’t let it boil, and stir around the edges to prevent the mixture from catching on the bottom of the pan. 

Step Four

Tip this mixture into the oats. 

Step Five

Mix well, taking care to ensure the oats are all coated. Dig down to the bottom of the bowl to make sure all of the oats are wet. 

Step Six

Tip into the prepared tin. 

Step Seven

Press down and to the sides with the back of a spoon until the oats are compact and the top is level. 

I actually do this with my fingers. It’s a little messy, but I find it easier to get them even like this. 

At this point, I also move some blueberries around if there are any big clumps or totally empty bits. 

Step Eight

Bake for 30 minutes until the top is golden brown.

This might take five minutes longer if your flapjacks are thicker than mine. 

Step Nine

Leave to cool completely in the tin before cutting into bars or squares. 

If you are in a rush, remove it carefully from the tin and let it cool on a wire rack or in the fridge for a bit. 

Take care when pealing the baking paper away.

Serving Suggestions

I usually just serve flapjacks with blueberries as they are. 

However, you could warm them up for 30 seconds in the microwave, a few minutes in the oven or in the air fryer and serve with cold vanilla ice cream for a special treat. 

You could also drizzle them with white chocolate to add a creamy flavour and a bit of decoration.

Variations

There are a few things that you can do differently with this blueberry flapjack recipe. 

Use Frozen Blueberries

Frozen blueberry flapjacks are fine. Add frozen blueberries like you would fresh; you don’t need to thaw them first. 

You might need to increase the bake time by five minutes, but I recommend still checking after 30 minutes. 

Add More Lemon

I love the little hint of lemon. You can smell it as they bake, and it adds a freshness to the flavour. 

But if you want more, add a few drops of lemon extract to your butter mixture. 

Add Nuts

I love adding things like nuts or seeds to flapjacks. 

I think crushed almonds, diced pecans, or walnuts could work well. 

Use Margarine

Swap butter for margarine if that is what you’ve got and what you usually use for things like flapjacks. 

Drizzle with White Chocolate

Melt some white chocolate (it’s temperamental, so I recommend using a Bain Marie) and drizzle onto cooled flapjacks for a cool finishing touch.