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Zesty lemon weetbix slice. A delicious and tart slice recipe, that is a fun twist to a classic treat. Perfect for afternoon tea or for a lunch snack.
This lemon slice is really yummy for a treat for afternoon tea. I based this recipe off my chocolate weetbix slice but halved the quantities. My husband absolutely loved it. He said “it is up in his Top 5 of all slices I make”….that is a pretty big call. As it only uses three weetbix, this is a great recipe to use the last of the weetbix in the bottom of the box. You could reduce the lemon juice in the icing if you would prefer less tangy icing on your slice.
To make the slice, first crush the weetbix and add to your mixing bowl, as well as caster sugar and coconut. Sift the flour into the bowl.
Add your lemon zest to the bowl and mix all the dry ingredients together. Then add your melted butter and vanilla essence, then mix to combine.
Spoon your slice base mixture into the pan and press down firmly. Bake in the oven for 15 minutes or until golden and cooked through.
You want to prepare the lemon icing mixture and pour it onto the slice while it is still hot from the oven.

Katrina - The Organised Housewife
Lemon Weetbix Slice
5 from 3 votes
Zesty lemon weetbix slice. A delicious and tart slice recipe, that is a fun twist to a classic treat. Perfect for afternoon tea or for a lunch snack.
Prep Time 15 minutes mins
Cook Time 15 minutes mins
Servings: 16 pieces
Course: Baking
Cuisine: Australian
Ingredients
Method
- Preheat oven to 180°C, fan forced.
- Line a slice pan (27x17cm) with baking paper.
- In a large bowl crush the weetbix, add coconut and caster sugar.
- Sift flour into bowl.
- Add lemon zest. Stir to mix through.
- In a jug mix together melted butter and vanilla.
- Pour into bowl of dry ingredients and mix to combine.
- Spoon mixture evenly into pan. Press mixture down firmly into pan.
- Bake slice in the oven for 15 minutes or until golden and cooked through.
- Once slice has been removed from oven prepare the icing.
- Sift icing sugar into a large bowl.
- Add lemon juice and stir well to combine.
- Pour icing over slice while still hot.
- Sprinkle with additional coconut.
- Allow slice to sit until completely cooled.
- Slice into small squares to serve.
- Store in an airtight container in the fridge or in a cool dry place.
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28 comments
Made the Lemon Weetbix slice for the first time yesterday. It is so simple and easy to make. Very tasty. I will add more lemon zest next time. There was no mention of how much vanilla so i put in a teaspoon. It is very moorish. Love it and will definitely make it again.
Glad you liked the recipe Wendy! Yes it is one teaspoon, sorry I have adjusted the recipe now.
A question really, am i able to use gluten free flour in the slice?
thank
s Shurley
I haven’t tried it myself but I imagine it would work fine. Please let me know how you go if you do try it! Kat x
I made this slice for afternoon tea today and it was really enjoyable. My son and husband loved it so well definately be making this again. I will add it to another one I make with chocolate and raspberries. Will also try this chocolate one as a comparison. Thank you for sharing this recipe and look forward to trying more.
So glad you liked it Sandra! You will love the chocolate version. Kat
Can we use limes instead? My lime tree is laden with limes…
I haven’t tried it but I think it would be yummy! Let me know if you do make it with limes. Kat x
Made this today. It was zesty, base had a good amount of crunch and the whole family loved it. Thank you for the recipe!
So glad you liked it. Kat x
Should we use pure or icing sugar mixture? Thanks!
Either would work fine. Kat x
Made this slice today – SO EASY & SO DELICIOUS. I’ve had 3 pieces today it’s very moreish.
Thanks for a wonderful recipe.
?Jody
Hi Jody, I’m so happy you enjoyed the recipe! Kat x
I’ve been making this slice for a while and my husband absolutely loves it. I use brown sugar instead of castor and also add some lemon zest to the icing as well as the base.
If lemons aren’t as plentiful, how much bottled lemon/juice could we use as an alternative..
I would suggest 1-2 tablespoons of bottled lemon juice in lieu of a lemon. Start with 1 and add to taste as bottled lemon juice can be stronger in flavour.
Hi there!
Lovely lemon slice recipe!
Can this be cut up and frozen?
Thanks ?
The slice is a favourite and I have recently used gluten free flour and gluten free weet bix…Every bit as nice!!
Oh, that’s a fantastic variation for gluten-free snacks! Thanks so much for sharing.
Hi if we dont have icing sugar can we use normal sugar but grinded up? like caster sugar but in powedered form?
Generally, I wouldn’t swap icing sugar for any other type of sugar as they are quite different consistencies and I’m not sure how the slice would turn out. If you try it, let me know how it went!
I use the broken and crushed ones at the end of the box for things like this
That’s a perfect idea, Suzanne!
Very tangy and was a huge hit with everyone at work.
Glad you all enjoyed it, Suzanne!
My 17 yo son is hard to please when I make homemade treats. His complaint is usually they taste ‘too healthy & aren’t sweet enough’ but after trying this slice that he wasn’t overly thrilled about at first upon hearing ‘weetbix slice’ – his winced up face in detest of a breakfast cereal being made into a slice but whilst I was at an after hours cleaning job he sent through a message saying it was 10/10! I was amazed!
It lasted 3 days in the house with him & his brother & now he’s asking me to make more!
I’m so happy I’ve found a winner! Will be making regularly.
Thank you for this great recipe! ?
The only changes I made was using GF weetbix which I brought half price (not that we are GF), added slightly less than 1/2 cup sugar & slightly less butter & added water instead. Also added some chopped dried apricots to the base mix. Turned out fine but was a little crumbly but that’s on me & of no bother…
Ooh yay, I am so glad you found something he liked and gave you a 10/10, winning!!!