This easy lemon Weetbix slice recipe features a crunchy coconut base and tangy lemon icing. Perfect for lunchboxes, bake sales, or afternoon tea, it’s a quick no-fuss slice made with simple ingredients like Weetbix, coconut, and fresh lemon. Keeps well and freezes easily.

A zesty twist on a classic slice, this lemon Weetbix slice pairs a crunchy coconut base with tangy lemon icing. Easy to make and perfect for lunchboxes, afternoon tea, or sharing with friends.

Ingredients

Base:

185g butter, melted (6.5 oz)
1 cup sugar
3 Weetbix, crushed
1 cup plain flour
1 cup desiccated coconut
1 tsp baking powder

Icing:

2 cups icing sugar
Zest and juice of 1 lemon (about 60ml)
50g butter, melted (1.7 oz)
Boiling water, as needed

Instructions

Preheat the oven to 180°C fan bake (355°F). Line a slice tin with baking paper.
Prepare the base: In a large microwave-safe bowl, melt the butter. Stir in the sugar until well combined.
Add the crushed Weetbix, plain flour, coconut, and baking powder. Mix thoroughly until all ingredients are incorporated.
Press the mixture firmly into the lined tray, smoothing the top evenly.
Bake for 15–20 minutes, or until golden and set around the edges but still soft in the center. It will firm up as it cools.
Make the icing: While the base is baking or cooling slightly, whisk together the icing sugar, lemon juice, lemon zest, and melted butter. Add a splash of boiling water if needed to reach a smooth, spreadable consistency.
Ice the slice while it is still warm to help the icing set smoothly. Allow to cool completely, then slice into squares.
Store in an airtight container in the fridge or a cool dry place.

Tips

Use fresh lemon juice for the brightest flavor.
Press the base down firmly to help it hold together when sliced.
Icing the base while warm helps it set with a glossy finish.

Variations and Substitutions

Coconut: Swap for rolled oats or ground almonds for a different texture.
Sugar: Brown sugar can be used for a deeper caramel note.
Citrus: Try lime or orange instead of lemon for a fresh variation.
Gluten-free: Use gluten-free Weetbix and flour to adapt the recipe.

FAQs

Can I make this slice dairy-free?
Yes, substitute butter with a plant-based alternative suitable for baking.

How long does it keep?
It stays fresh for up to 5 days in an airtight container.

Can I freeze it?
Absolutely. Freeze in slices with baking paper between layers. Defrost at room temperature.

Serving Suggestions

Serve with a hot cup of tea or coffee for a satisfying snack.
Add to lunchboxes for a homemade sweet treat.
Dress it up with a dusting of extra lemon zest before serving.

Why You’ll Love This Recipe

Quick and simple – comes together with pantry staples.
Great texture – soft yet structured with a coconut crunch.
Bright citrus flavor – a refreshing option for any time of year.
Versatile – perfect for casual snacking or entertaining.