Creaming
Beating solid fat with sugar to force air into the fat, creating the gas cells a chemical leavener will later expand.
Creaming beats solid fat and sugar together until the mixture is pale and noticeably increased in volume. The sugar crystals act as cutting edges, tearing air pockets into the fat, and the fat holds them.
Its importance is routinely underestimated because the leavening is credited to the baking powder. In fact the creaming step CREATES the cells and the leavener merely inflates them — so a poorly creamed batter cannot be rescued by more baking powder, which will simply produce large irregular holes.
The technique depends on the fat being at the right temperature. Too cold and it will not hold air; too warm and it is too soft to retain the pockets, and the mixture looks greasy rather than light.
What it is for
To incorporate air into solid fat, creating the gas cells that leavening will expand during baking.
RecordedPaula Figoni, John Wiley & Sons
How to tell it has worked
- The mixture lightens visibly in colour.
- The volume increases appreciably.
- The texture becomes light and slightly fluffy rather than dense and greasy.
What it changes
| Property | Effect | Why |
|---|---|---|
| Volume | Increases | More gas cells give the leavener more to expand. |
| Crumb texture | Changes | Many small cells give a fine even crumb; few large ones give a coarse irregular one. |
What 'pale and fluffy’ actually means, and why the timing is unreliable
Recipes give a time — three minutes, five minutes — and the time is a poor instrument. It depends on the mixer, the speed, the quantity, and above all on how soft the butter was when it started. Cold butter will not cream at all for the first few minutes; over-soft butter never creams properly at any duration.
The change to watch for is a change of state rather than of colour alone. Correctly creamed butter and sugar has visibly increased in volume, has gone from yellow to a pale off-white, and has lost its grainy look as the mixture becomes uniform. It holds a soft peak when the beater is lifted and it does not slump back into the bowl.
The mechanism explains all three signs. Sharp sugar crystals drag air into the fat; the air is what increases the volume, and it is also what scatters light and makes the mixture look pale. A mixture that has not aerated stays yellow and dense because there is nothing in it to scatter light.
OVER-CREAMING is possible and looks like separation: the mixture becomes very soft, greasy and loose, usually because friction has warmed the butter past the plastic state. It cannot be fixed by beating further, and chilling briefly is the only recovery.
Related
Used in
Creaming creates the gas cells the leavener later expands, which is why more baking powder cannot rescue a poorly creamed batter.
The method the cake exists to demonstrate.
Standard, though the batter is a minority of the cake.
Standard.
Standard.
The science behind it
Creaming matters because leavening gases expand existing cells rather than creating new ones, so the cells must exist first.
Fat plasticity and crystal structure
Creaming needs a fat in the plastic state and a crystal structure fine enough to hold air. Butter that is too cold has neither the give nor the yield; butter that is melting has no crystal network left at all.
Products that depend on this
The aeration a creamed cake depends on is mechanical and comes from this step. A chemically leavened batter expands cells that creaming created; without them there is far less to expand.
Covered in
The cake families, sorted by how the air gets in
The mechanism that defines the largest family.
What happens when you reduce the sugar
Where sugar is doing structural work most obviously — the crystals are the aeration mechanism.
Compared in
Melting does not make creaming harder; it removes the thing creaming works on.
History and culture
The aeration mechanism somebody had to notice was doing something.