Chef Juliette
Butters and Creams
Beurres et crèmes d’hors-d’œuvre prove that cold-table finesse is mostly timing: smooth good dairy, cover it closely, hold it cool, then season only as you dish so every spoonful keeps a clean edge.
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Milt Butter
Created by Chef Juliette
Beurre de laitances turns mild herring milt, lemon, mustard, and its own weight in butter into a pale, silken spread. Gentle poaching preserves tenderness; the fine sieve makes the dish.
Appetizers & Snacks
French
Make Ahead
Dinner Party
20 min
Active Time
8 min cook•2 hr 28 min total
YieldAbout 1 cup (240 ml), 8 appetizer servings
Beurre de laitances (milt butter) teaches the discipline of refinement. Soft herring roe needs barely enough heat to set, then its own weight in butter to become supple. The one true thing to know before touching the pan is that browning has no place here: keep the milt pale and tender so the lemon and mustard can lift its mild, milky character.
The original formula assumed a covered buttered sauté pan, a mortar, and a fine tamis always within reach. A small lidded skillet, a sturdy bowl and fork, and a fine-mesh sieve do the same work at home. No brigade reduction is needed because four ounces of milt already makes one generous crock for an appetizer table. What changed is the equipment, not the sequence or proportions. The mortar is scaffolding and may go; the fine sieving is the dish and must stay.
Poach gently, pound the roe while warm, then let it cool enough that it won't melt the softened butter. If the mixture turns oily, ça se rattrape, and the method will show you where to pause. Before you begin, set out the fine sieve: rubbing every spoonful through it is the step that decides whether this becomes a coarse fish paste or true beurre de laitances.
Beurre de laitances belongs to the classical French hors-d'œuvre table and garde-manger, the cold station, where fish roes were treated as delicate ingredients rather than discarded trim. Herring links it most closely to the Channel fish trade of Boulogne-sur-Mer and Dieppe, though the butter entered the national repertoire rather than remaining a named northern specialty. Laitance is soft male roe, not fish eggs; pounding and sieving turn its milky flesh into a spread whose richness is sharpened, not disguised, by lemon and mustard.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
fresh soft herring roe (milt)
Quantity
1/2 cup (120 ml / 113 g)
rinsed and patted dry
unsalted butter for the pan
Quantity
1 teaspoon (5 ml / 5 g)
fresh lemon juice
Quantity
1 1/2 tablespoons (22 ml / 22 g), from 1/2 medium lemon
unsalted butter
Quantity
1/2 cup (120 ml / 113 g)
softened, exactly the same weight as the milt
smooth Dijon mustard
Quantity
1 teaspoon (5 ml / 5 g)
| Ingredient | Quantity |
|---|---|
| fresh soft herring roe (milt)rinsed and patted dry | 1/2 cup (120 ml / 113 g) |
| unsalted butter for the pan | 1 teaspoon (5 ml / 5 g) |
| fresh lemon juice | 1 1/2 tablespoons (22 ml / 22 g), from 1/2 medium lemon |
| unsalted buttersoftened, exactly the same weight as the milt | 1/2 cup (120 ml / 113 g) |
| smooth Dijon mustard | 1 teaspoon (5 ml / 5 g) |
Equipment Needed
- •Digital kitchen scale
- •20 cm (8-inch) lidded sauté pan
- •Mortar and pestle or sturdy medium bowl with a fork
- •Fine-mesh sieve
- •Flexible spatula
Instructions
- 1
Prepare the milt
Rinse the milt briefly under cold water, then pat it thoroughly dry. Trim away any loose blood vessels or ragged membrane without tearing the soft roe sacs apart. Weigh the cleaned milt before measuring the finishing butter, because the ratio is exact: one part milt to one part butter by weight.
Soft herring roe is laitance, the male roe. It should be pale cream, plump, and mild-smelling, never yellowed, leaking, or sharply fishy. - 2
Poach under cover
Rub the teaspoon of butter over the base of a 20 cm (8-inch) lidded sauté pan. Lay in the milt and pour the lemon juice around it. Pocher à couvert, poach gently under cover, over the lowest heat for 5 to 8 minutes, turning once, until the roe is opaque and tender throughout and reaches 63°C (145°F). The butter must remain pale. If it begins to colour, slide the pan off the heat at once, lower the flame, and finish with the lid on; ça se rattrape as long as the roe hasn't browned or tightened.
- 3
Pound the roe
Scrape the cooked milt and every drop of the butter-lemon cooking juices into a mortar or sturdy bowl. Pound with a pestle, or crush firmly with a fork, until no large pieces remain and the mixture forms a soft paste. Let it stand for about 5 minutes, until warm rather than hot. Hot roe melts the finishing butter and leaves the mixture greasy.
- 4
Work in butter
Add the softened butter in four portions, working each one completely into the roe before adding the next. Beat in the Dijon mustard until the mixture is uniform and satiny. If it turns loose and oily, the bowl was too warm. Refrigerate it for 10 minutes, then beat again until it comes together. If hard flecks of butter remain, let the bowl stand at room temperature for 5 minutes before continuing.
- 5
Sieve it fine
Set a fine-mesh sieve over a clean bowl and press the mixture through with a flexible spatula, working a spoonful at a time. Scrape the smooth butter from the underside of the sieve and discard the tiny membranes left behind. Do not skip this step. Pounding breaks down the roe, but sieving gives beurre de laitances its fine, unified texture. If the mixture becomes too firm to pass, leave it at room temperature for several minutes, then continue.
- 6
Chill and serve
Pack the sieved butter into a small crock, smooth the surface, and cover it closely. Refrigerate for at least 2 hours so it sets and the mustard and lemon settle into the roe. Take it from the refrigerator 15 to 20 minutes before serving; it should yield easily to a spreading knife, not sit waxy and hard. Serve with thin, crisp toast. À table!
Chef Tips
- •Fresh soft herring roe is seasonal and highly perishable. Frozen milt from a reliable fishmonger, thawed overnight in the refrigerator, is an honest choice and preferable to tired fresh roe. Salted or cured hard roe won't work in this formula.
- •Weigh the milt and finishing butter. Equal weight is the structure of the recipe, not a suggestion. Use real unsalted butter, softened but still cool; a fat substitute won't bind or taste as this preparation should.
- •Serve the beurre de laitances on thin toast or plain country bread while it is cool and spreadable. A dry, mineral white wine is enough beside it; the roe needs freshness, not ceremony.
Advance Preparation
- •Prepare the beurre de laitances up to 2 days before serving. Keep it tightly covered in the refrigerator so its delicate flavour doesn't absorb stronger aromas.
- •If using frozen milt, thaw it overnight in the refrigerator on a covered plate, then drain and pat it thoroughly dry before weighing.
- •Remove the finished butter from the refrigerator 15 to 20 minutes before serving so it softens without becoming oily.
Frequently Asked Questions
Nutrition Information
1 serving (about 30g)
Calories
125 calories
Total Fat
13 g
Saturated Fat
8 g
Trans Fat
0.5 g
Unsaturated Fat
4 g
Cholesterol
85 mg
Sodium
25 mg
Total Carbohydrates
0 g
Dietary Fiber
0 g
Sugars
0 g
Protein
3 g
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