Botany / Plant Biochemistry / Agricultural Biotechnology

High School Track·Homemade butter from cream

Homemade butter from cream

Mechanical agitation of cream causes fat globules to collide and coalesce, separating butterfat (butter) from buttermilk, a real, simple dairy-science process.

Where to buy & price

Just examples of where to look and roughly what to expect to pay, get everything from wherever works for you, at whatever price you find.

Fresh cream, Naivas/Quickmart dairy section, ~KSh 150–250/250ml.

Cold storage / timing

The cream should be slightly chilled (fridge, ~30 minutes before starting), this is a real requirement, as cream that's too warm won't separate properly; the finished butter should then be refrigerated to firm up.

Reagents & materials required

Fresh heavy/whipping cream1-2 cups, enough to half-fill your jar

Procedure, step by step

  1. 1

    Chill fresh heavy or whipping cream in the fridge for about 30 minutes before starting.

  2. 2

    Pour the cold cream into a clean jar with a tight-fitting lid, filling it no more than halfway to leave room for movement.

  3. 3

    Seal the jar tightly and shake vigorously and continuously, this typically takes 10–20 minutes by hand, or just a few minutes with an electric mixer.

  4. 4

    Watch the texture change in order: first it thickens into whipped cream, then it turns grainy and starts to separate.

  5. 5

    Keep shaking until you see solid yellow clumps of butter clearly separating from a thin, milky liquid, the buttermilk.

  6. 6

    Pour off and keep the buttermilk (it's genuinely useful for baking), then press the solid butter clump gently to squeeze out any remaining liquid.

  7. 7

    Rinse the butter briefly under cold water while pressing it, to remove residual buttermilk and help it keep longer.

  8. 8

    Refrigerate the finished butter to firm it up before use.

Read more: University of Wisconsin Center for Dairy Research's overview of the chemistry behind butter churning.

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