Passionfruit Weetbix Slice

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This Passionfruit Weetbix Slice has a chewy coconut and weetbix base which goes so well with the delicious passionfruit icing.

Six square Passionfruit Weetbix Slice bars with a light yellow frosting speckled with small dark seeds are arranged on a wooden board.

My most popular recipe ever is Chocolate Weetbix Slice, it has had close to 3 million video views on Facebook. So I thought it was about time that I tried out some other variations on this Kiwi classic. I was so happy with the way this Passionfruit Weetbix Slice turned out, I am sure I will be making it over and over again in the future.

Various baking ingredients including icing sugar, coconut, white sugar, flour, butter, baking powder, Weet-Bix, and passionfruit are arranged on a kitchen counter for a delicious Passionfruit Weetbix Slice.

Everyone loves a good slice recipe, it is so satisfying to have delicious baking in your tins. Then you are always ready with a sweet treat if someone wants to pop in for a cuppa. If you love baking with Weetbix as much as I do, be sure to check out my collection of The Best Weetbix Recipes.

A glass bowl with creamed mixture and a pile of flour on top, being mixed with an orange spatula—perfect for preparing a delicious lemon weetbix slice on your kitchen countertop.

How to make Passionfruit Weetbix Slice:

Preheat oven to fan bake 180C. Melt butter in a large microwave proof bowl, add sugar and stir together. Crush in weetbix, add flour, coconut and baking powder. Mix together. Pour into a lined tray and press down firmly.

A glass bowl with partially mixed cookie dough for a lemon weetbix slice, including flour, sugar, and butter, sits on a gray countertop with an orange spatula in the bowl.

Unbaked oat and fruit mixture for a lemon weetbix slice is pressed into a parchment-lined rectangular baking dish, ready to be baked.

Bake for 20 mins. Mix together icing sugar, butter and passionfruit pulp. Add boiling water if needed to loosen mixture and whisk out any lumps.

A lemon weetbix slice, baked to perfection in a rectangular pan lined with parchment paper, rests invitingly on a wooden board.

A clear glass bowl containing a yellow batter for Passionfruit Weetbix Slice, with visible chocolate chips evenly mixed throughout.

Ice the slice while it is still warm then chop up once cooled and icing has set. Store in an airtight container in the fridge or in a cool dry place.

Three frosted Passionfruit Weetbix Slice bars with a yellow topping and dark specks are on a blue plate, with more bars on a wooden board in the background.

Recipe FAQs:

What size tin do you use?

My tin is 29 x 19 cm and the cook time works well for me in my oven. If your tin is smaller, allow a little longer to cook as the base will be thicker.

How long will this slice keep for?

This slice keeps well for 3-5 days in an airtight container.

Can I overcook this slice?

Yes. If you overcook Passionfruit Weetbix slice it can go quite hard. I recommend baking this for 14-20 minutes however, all ovens are different. If you know your oven 'runs hot' test it at the 15 minute mark. It should be soft when you bring it out of the oven and it will firm up as it cool down.

Storage:

Lemon weetbix slice can be store in an airtight container in the pantry for up to one week.

This slice can also be frozen. Wrap well with cling wrap, baking paper or tin foil and freeze in an airtight container.

Top Tips:

This slice can also be made gluten free. Simply use gluten free weetbix and one cup of gluten free flour or almond meal.

Related Recipes:

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Passionfruit weetbix slice

Yield: 24

Prep Time: 10 minutes

Cook Time: 20 minutes

Total Time: 30 minutes

A chewy coconut and weetbix base with delicious passionfruit icing.

Ingredients

Base

185 grams of butter (melted)
1 cup of sugar
3 Weetbix, crushed (approx 50g)
1 cup of flour
1 cup of coconut
1 teaspoon of baking powder

Icing

2 cups of icing sugar
3 passionfruit, pulp (60ml)
50 grams butter (melted)

Instructions

Preheat oven to fanbake 180C.
Melt butter in a large microwave proof bowl, add sugar and stir together.
Crush in weetbix, add flour, coconut and baking powder. Mix together.
Pour into a lined tray and press down firmly.
Bake for 20 mins.
Icing: Mix together icing sugar, butter and passionfruit pulp. Add boiling water if needed to loosen mixture and whisk out any lumps.
Ice the slice while it is still warm then chop up once cooled and icing has set.
Store in an airtight container in the fridge or in a cool dry place.

Nutrition Information:

Yield: 24 Serving Size: 1
Amount Per Serving: Calories: 180Total Fat: 9gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 21mgSodium: 99mgCarbohydrates: 25gFiber: 1gSugar: 19gProtein: 1g

Nutritional values are approximate. Please use your own calculations if you require a special diet.

Thank you for checking out this recipe. I hope you enjoy making and eating it! If you have any questions, queries or feedback, please feel free to leave a comment below.
If you don't already follow me, head over to my Instagram, Facebook or TikTok pages to keep up to date with all my new recipes.
Vanya

Comments

Yolande says

February 24, 2024 at 11:35 pm

Can you make the base without the coconut?

- VJ cooks says
  
  February 26, 2024 at 11:28 am
  
  Yes, Weetbix slice will still work well without coconut, simply add 1 extra Weetbix and ½ a cup of additional flour.
  
  - Yolande says
    
    March 01, 2024 at 5:15 pm
    
    Thank you!
    
Emmalene says

March 17, 2026 at 8:14 am

Delicious. I used the coconut substitute from the comments (extra weetabix & flour) and added a little cinnamon and vanilla to the base too. This was amazing, my family has already eaten half. Thank you!

- VJ cooks says
  
  March 17, 2026 at 11:49 am
  
  That's great to hear! Thanks for the feedback, Emmalene.