How to Make a Mirror Glaze
A true mirror glaze is about physics as much as pastry. It creates a sleek, reflective surface that turns a standard cake into an object of precision.
Temperature is the only variable that matters.
Your cake must be frozen solid before pouring, or the glaze will slide right off. Use an immersion blender to emulsify the mixture, but keep the blade submerged to avoid trapping bubbles.
- Immersion blender
- Digital thermometer
- Fine mesh sieve
- Saucepan
- Offset spatula
What goes in.
- 20ggelatin powder
- 120mlcold water (for blooming)
- 300ggranulated sugar
- 300gglucose syrup
- 150mlwater
- 200gsweetened condensed milk
- 300gwhite chocolate, finely chopped
- as neededgel food coloring
Blending without bubbles
Keep the head of your immersion blender flat against the bottom of the pitcher and never lift it while running. If you incorporate air, those bubbles will remain trapped in your finished glass surface.
The method.
Bloom the gelatin
Whisk the gelatin powder into the 120ml of cold water and set it aside for ten minutes until it turns into a firm sponge.
Cook the syrup
Combine the sugar, glucose, and 150ml water in a saucepan over medium heat. Bring to a boil until the sugar fully dissolves.
Emulsify
Pour the hot syrup over the chopped chocolate and condensed milk in a tall pitcher. Add the bloomed gelatin and food coloring. Blend with the immersion blender until perfectly smooth.
Strain
Pass the mixture through a fine mesh sieve into a clean container to remove any remaining air bubbles or un-melted chocolate.
Cool and pour
Cover with plastic wrap pressed directly against the surface. Let it cool until it reaches exactly 90°F. Place your frozen cake on a rack over a tray and pour the glaze in one steady motion starting from the center.
Other turns to take.
Dark Chocolate Mirror
Replace the white chocolate with 70% dark chocolate and omit the food coloring for a deep, opaque black finish.
When it doesn't go to plan.
If you see bubbles on the surface after pouring, gently blow on them with a hairdryer on the lowest setting to pop them.
Wait until the glaze is thick enough to coat the back of a spoon before pouring.
If the glaze gets too cold, warm it gently in the microwave in 5-second intervals, stirring carefully.
The ones that keep coming up.
Why did my glaze slide off the cake?
Your cake was likely not cold enough. The temperature difference between the warm glaze and the frozen cake is what causes the glaze to set instantly.
Can I reuse leftover glaze?
Yes. Keep it in the refrigerator in an airtight container for up to a week. Reheat carefully before using.
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