Cannabis Vanilla Slice
Cannabis Vanilla Slice. Approximately ~25mg THC per slice at full strength. 3 hours total, 12 slices yield.
The vanilla slice holds legendary status in Australian bakeries — that perfect combination of buttery puff pastry, rich vanilla custard, and sweet icing that’s sparked countless debates about which bakery does it best. This cannabis-infused version maintains all the nostalgic charm while adding a gentle, long-lasting effect that’ll have you appreciating this Aussie classic in a whole new way.
Our recipe uses cannabutter in both the custard and icing, delivering approximately 25mg THC per slice when made with standard cannabutter. The creamy custard helps mask any cannabis flavour while the effects develop slowly and smoothly over 1-2 hours, or calculate your exact dose with our free Edibles Dosage Calculator.
Precision scale for accurate cannabis and ingredient measurements — essential for consistent dosing.
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Ingredients
Cannabis Vanilla Slice
🥐 Pastry Base
- 2 sheets frozen puff pastry, thawed
- 1 egg, beaten for wash
🍮 Cannabis Custard
- 500ml whole milk
- 100ml thickened cream
- 6 large egg yolks
- 110g caster sugar
- 50g cornflour
- 60g cannabutter, softened
- 2 tsp vanilla extract
🎂 Cannabis Icing
- 300g pure icing sugar
- 30g cannabutter, melted
- 3-4 tbsp warm milk
- 1 tsp vanilla extract
- Pink food colouring (optional, for traditional look)
Equipment You’ll Need
Digital Kitchen Scale (0.01g)
Precision scale for accurate cannabis and ingredient measurements — essential for consistent dosing.
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Nut Milk Bag / Fine Mesh Strainer (2-pack)
Reusable organic cotton strainer bags — finer mesh than cheesecloth for ultra-smooth infusions.
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Medicine Lock Box (Child-proof, Combination)
Lockable storage box with combination lock — essential for keeping cannabis edibles away from children.
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Method
Prepare your lamington tin (20x30cm) by lining with baking paper. Preheat oven to 200°C.
Roll each pastry sheet to fit your tin size. Place one sheet in the base, pressing gently into corners. Brush with beaten egg and prick all over with a fork to prevent puffing.
Blind bake the base pastry for 12-15 minutes until lightly golden. Remove and cool completely while preparing custard.
Make the cannabis custard by whisking egg yolks and sugar until pale. Add cornflour and whisk until smooth. Heat milk and cream in a saucepan until just simmering.
Temper the egg mixture by slowly pouring hot milk while whisking constantly. Return to saucepan and cook over medium heat, stirring continuously, until thick enough to coat the back of a spoon (about 5-7 minutes).
Finish custard by removing from heat and immediately stirring in cannabutter and vanilla until completely smooth. Press plastic wrap directly onto surface to prevent skin forming.
Assemble by spreading cooled custard evenly over the pastry base. Top with second pastry sheet, brush with egg wash, and bake for 15-20 minutes until golden.
Cool completely in the tin before making icing. Mix icing ingredients until smooth, adding milk gradually until spreadable consistency is reached.
Ice the cooled slice and refrigerate for at least 2 hours before cutting with a sharp knife into 12 even portions. Store covered in the fridge.
Expert Tips
Perfect Custard Consistency
Don’t rush the custard — low heat and constant stirring prevents lumps and ensures silky smoothness.
Clean Cutting
Use a sharp knife dipped in warm water between cuts for neat, bakery-style slices without custard squeezing out.
Half-Strength Option
Replace half the cannabutter with regular butter to create 12.5mg slices — perfect for cannabis newcomers.
Pastry Success
Keep pastry cold until ready to use, and don’t skip the egg wash — it creates that beautiful golden finish.
Storage Labels
Always label your cannabis vanilla slice with contents, date, and dosage per slice to avoid confusion.
Flavour Balance
The vanilla and custard naturally complement cannabis flavours — no need for additional masking ingredients.
Storage Guide
| Method | Duration | Notes |
|---|---|---|
| Room temperature | 1 day | Cover tightly, custard needs cool storage |
| Refrigerated | 5-7 days | Best option — keeps custard fresh |
| Frozen | 2 months | Slice first, wrap individually |
Important Safety Information
- Calculate your dose before cooking — use our free Edibles Dosage Calculator.
- Start low, go slow. If this is your first time with edibles, eat half a serving (~12.5mg) and wait at least 90 minutes before having more.
- Onset time: 30-120 minutes. Do not eat additional servings within this window.
- Duration: Effects can last 4-8 hours.
- Do not drive or operate machinery after consuming cannabis edibles.
- Store securely — label all containers with contents, date, and dosage. Keep away from children, pets, and unsuspecting housemates.
- Legal context: Cannabis remains illegal for recreational use in most Australian states. Medicinal cannabis is available through TGA-approved prescriptions. Know your state’s laws.
- Emergency: Australian Poisons Information Centre — 13 11 26 (24 hours)
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Frequently Asked Questions
Absolutely! This is a great way to reduce potency while maintaining texture. Replace half the cannabutter with regular butter in both custard and icing for slices with approximately 12.5mg THC each.
Cannabis edibles typically take 30-120 minutes to take effect, with vanilla slice often taking closer to 60-90 minutes due to the dairy content. The custard and pastry slow absorption, creating a more gradual onset than other edibles.
Yes, decarboxylation is essential before making cannabutter. Raw cannabis contains THCA, which needs heat activation to become psychoactive THC. Our cannabutter guide covers the complete decarb process.
Always refrigerate due to the custard filling — it’ll keep for 5-7 days covered in the fridge. For longer storage, slice first and freeze individual portions for up to 2 months. Always label with dosage information.
Stay calm and hydrated. Find a comfortable, safe space and remember effects are temporary. Try CBD if available, as it may help counteract THC. If you’re very uncomfortable, contact Australian Poisons Information Centre (13 11 26) or seek medical attention.
Yes, but use about 20% less cannabis coconut oil as it’s typically more potent. The coconut flavour will be noticeable in vanilla slice, so consider this if you prefer traditional taste. Solid coconut oil works best for both custard and icing.
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