Gianduja Build

Gianduja—the Italian marriage of chocolate and hazelnut—demands special technique. The split-cream method ensures proper chocolate emulsification while extracting maximum nut flavor. This build produces intensely flavored, silky-textured frozen dessert.

Characteristics

Property	Value
Fat %	~18–22% (varies with chocolate)
MSNF	~6%
Total sugar	~18%
PAC	~240
Target overrun	25–40%
Character	Intense, nutty, chocolatey

Master Formula

Component	1 Qt	2 Qt	3 Qt	4 Qt
In Custard Jars
Hazelnuts, toasted	185g	370g	555g	740g
Whole milk	245g (1 c)	490g	735g	980g
Heavy cream (portion 1)	238g (1 c)	476g	714g	952g
Granulated sugar	150g	300g	450g	600g
Fine sea salt	1.5g	3g	4.5g	6g
Egg yolks	100g (5)	200g (10)	300g (15)	400g (20)
Chocolate Build
Heavy cream (portion 2)	238g (1 c)	476g	714g	952g
Dark chocolate (64–70%)	115g	230g	345g	460g
Vanilla extract	2.5g (½ tsp)	5g	7.5g	10g

Calculated Values

Fat Breakdown (Approximate)

Source	Amount (1 Qt)	Fat Contribution
Cream portion 1 (36%)	238g	85.7g
Cream portion 2 (36%)	238g	85.7g
Whole milk (3.5%)	245g	8.6g
Egg yolks (30%)	100g	30g
Chocolate (40% cocoa butter)	115g	46g
Hazelnuts (60%)	185g	111g (partial extraction)

Extracted nut fat varies; total fat likely 18–22%.

Method

Toast Hazelnuts

Spread hazelnuts on sheet pan. Toast at 325°F / 165°C for 12–15 minutes until fragrant and golden throughout. Skins will crack.

Remove Skins

While warm, wrap nuts in clean kitchen towel. Rub vigorously to remove loose skins. Some skin remaining is fine.

Chop Nuts

Chop fine, about 3–5mm. Do not pulverize—you want surface area without powder, but finer pieces extract more during the cook.

Build Custard

Whisk yolks, sugar, and salt. Whisk in milk and cream portion 1. Divide between mason jars. Divide chopped hazelnuts evenly among jars.

Sous Vide

Cook at 181°F / 82.8°C for 50 minutes. Swirl gently at 25 minutes.

Prepare Chocolate

During final 10 minutes of custard cooking:

Place chopped chocolate in large, dry bowl
Heat cream portion 2 to just below boiling (180°F / 82°C)
Pour over chocolate
Let sit 1 minute
Whisk from center outward until smooth and glossy

Strain Custard into Chocolate

Remove jars from water bath. Immediately strain hot custard through fine-mesh strainer directly into chocolate. Press hazelnuts firmly to extract oils.

Emulsify

Whisk until completely combined and glossy. If emulsion looks broken (oily sheen, grainy), blend with immersion blender for 30 seconds.

Cool and Add Vanilla

Cool in ice bath to below 40°C. Whisk in vanilla extract.

Age

Cover and refrigerate minimum 8 hours, preferably overnight. This base benefits from extended aging.

Churn

Churn to –6°C / 21°F.

Harden

Transfer and freeze minimum 4 hours.

The Split-Cream Method Explained

Why Split the Cream?

Cream in custard: Carries fat to extract nut oils during sous vide. Creates rich base.

Cream scalded on chocolate: Forms ganache emulsion that incorporates smoothly. Prevents seized chocolate.

Common Mistakes

Mistake	Result	Prevention
All cream in custard, none for chocolate	Chocolate seizes when custard added	Follow split ratios
Cold cream on chocolate	Chocolate hardens, won’t emulsify	Cream must be scalded (180°F+)
Chocolate not chopped fine	Uneven melting	Use pistoles or chop finely
Water in chocolate bowl	Chocolate seizes immediately	Ensure all equipment is dry
Custard too cool when strained	Poor emulsion	Strain while hot

Chocolate Options

Chocolate	Character	Sugar Adjustment
Milk (38%)	Sweet, mild, classic gianduja	Reduce custard sugar 30g
Dark (64%)	Balanced, complex	Standard formula
Dark (70%)	Intense, less sweet	Standard formula or reduce 15g
Dark (85%)	Very bitter	Increase sugar 20g
White (35%)	Sweet, creamy	Reduce custard sugar 50g

Nut Variations

Pistachio Gianduja

Adjustment
Replace hazelnuts with	185g raw pistachios
Toast at	300°F for 10 minutes (gentler)
Pair with	White chocolate (115g) or milk chocolate
Add	2g almond extract

Almond Gianduja

Adjustment
Replace hazelnuts with	185g blanched almonds
Toast at	325°F for 12–15 minutes
Pair with	Dark chocolate (70%)
Add	5g amaretto (post-cool)

Peanut Butter Chocolate

Adjustment
Replace hazelnuts with	120g natural peanut butter
Add peanut butter	To warm ganache, whisk to combine
Use	Milk chocolate for classic flavor

Mix-In Options

Fold at pack time:

Mix-In	Amount per 1 Qt	Prep
Toasted hazelnuts (chopped)	60g	Toast, chop to 5mm
Chocolate chunks	60g	Freeze before adding
Cocoa nibs	30g	No prep needed
Hazelnut praline pieces	50g	Make or purchase
Feuilletine	40g	Add immediately before serving

Troubleshooting

Problem	Cause	Solution
Grainy chocolate texture	Emulsion broke	Blend with immersion blender
Weak nut flavor	Under-toasted or under-pressed	Toast darker; press firmly when straining
Chocolate seized	Water contamination or cold cream	Ensure dry equipment; scald cream properly
Too sweet	High sugar + milk chocolate	Use darker chocolate or reduce sugar
Icy texture	High water from milk, low PAC	Add 30g dextrose to custard
Oily appearance	Fat separation	Re-emulsify with immersion blender

Advanced: Nut Paste Variation

For even more intense nut flavor, supplement with commercial paste:

Addition	Amount per 1 Qt	Adjustment
Hazelnut paste (100% nuts)	60g	Reduce cream portion 1 by 40g
Add paste to	Finished ganache, whisk to combine

Next: No-Churn Base →