2026 Oct 4th
Foodservice definition, a step-by-step line method, how to rescue a broken sauce, how an emulsion differs from a roux or slurry, and the tools that keep dressings and warm sauces stable.
An emulsion is fat and a water-based liquid that normally separate, held together as one creamy, stable mix. Kitchens stream oil or melted butter slowly into a base while whisking or blending, often with an emulsifier such as egg yolk or mustard. Vinaigrette, mayonnaise, hollandaise, and beurre blanc are classic line emulsions.
Tiny fat droplets are held in the water phase (or the reverse) so the sauce stays creamy.
Egg yolk, mustard, and lecithin help fat stay suspended.
Oil or melted butter goes in a thin stream while you whisk or blend constantly.
The mix turns opaque, thickens, and coats a spoon without oily pools.
Whisk the broken sauce into a fresh spoon of water phase or yolk.
Mixing bowls, an immersion blender, sauce pans for warm emulsions, and hotel pans for the hold.
An emulsion is a stable mix of fat and a water-based liquid that normally want to separate. In kitchens, you force tiny fat droplets into the water phase (or the reverse) so the sauce stays creamy instead of splitting.
Classic line emulsions include vinaigrette, mayonnaise, hollandaise, beurre blanc, and many cream sauces and dressings.
Menu language like “emulsified vinaigrette,” “hollandaise,” “mayo-based,” or “broken sauce” points to this technique. A working station may show:
Many emulsions use egg yolk or dairy, and warm emulsions such as hollandaise are time and temperature sensitive. Handle them under the site’s written food-safety plan and the local food-premise authority.
See CFIA — Requirements for food businesses. Verify current local requirements for your licensed kitchen.
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| Factor | Emulsion | Roux | Reduction |
|---|---|---|---|
| What it is | Fat dispersed in a water-based liquid | Fat and flour cooked together | Liquid simmered so water evaporates |
| How it thickens | Suspended fat droplets | Cooked flour starch | Concentration |
| Key action | Stream fat in while whisking or blending | Cook out the flour, then whisk in liquid | Simmer uncovered |
| Common failure | Breaks and separates | Lumps or raw flour taste | Over-reduced or scorched |
| Typical use | Vinaigrette, mayonnaise, hollandaise, beurre blanc | Béchamel, velouté, gravies | Pan sauces and glazes |
Emulsify when fat and liquid need to become one creamy sauce. Use a roux for starch-based body. Reduce when the liquid itself needs concentrating.
Non-skid mixing bowls for whisked vinaigrettes and mayo.
Immersion blender for fast, steady emulsions.
Stainless sauce pan for warm butter emulsions.
Light sauce pan for small warm sauces and gentle rewarming.
Half-size hotel pan for holding labelled sauce batches.
Full-size hotel pan for larger dressing and sauce holds.
Solid lid to keep held batches covered on the line.
An emulsion is fat and a water-based liquid that normally separate, held together as one creamy, stable mix.
Vinaigrette, mayonnaise, hollandaise, beurre blanc, and many cream sauces and dressings.
An emulsifier helps fat stay suspended in the water phase. Egg yolk, mustard, and lecithin are common in kitchens.
Streaming fat in slowly while whisking or blending constantly lets the base take in the fat as tiny droplets, so the mix thickens instead of separating.
The mixture turns opaque, thickens, and coats a spoon or greens without oily pools.
Put a fresh spoon of the water phase or egg yolk in a clean bowl, then whisk the broken sauce into it slowly.
Only briefly. A quick shake makes a temporary mix that separates. A stable emulsion holds together, often with an emulsifier and steady whisking or blending.
No. A roux and a slurry thicken with starch. An emulsion binds and thickens with fat dispersed in liquid.
Add more fat to thicken it. Add more water phase or acid to loosen it. If a warm emulsion cools and tightens, warm it gently.
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Canadian foodservice supplies for operators who need mixing bowls, blenders, sauce pans, and hotel pans for dressing and sauce work — not a poultry or meat distributor.
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Chicken Pieces uses foodservice-focused, Health Canada- and CFIA-aware language where relevant. It is a foodservice and hospitality supply company founded in 2018—not a poultry or meat distributor.
