Why the same recipe is hotter some years

A recipe specifies a variety and a weight. Neither specifies heat, and the gap between them is where batch-to-batch drift lives.

The pepper is the variable

Published heat ranges for a single variety commonly span a factor of three or more. That is not measurement error, it is the actual spread, and your supply moves around inside it from season to season and field to field.

Your process does not change heat much. Capsaicin survives cooking and fermentation, so what goes in is what comes out.

What drives it

Water stress raises heat: a plant under drought produces hotter fruit. Sun exposure raises it. Ripeness raises it, so a red jalapeño is hotter than the same fruit picked green. Soil and season do the rest.

Practically, that means a hot dry summer gives you a hotter crop, and a grower who irrigates heavily gives you a milder one. It is worth asking.

Measuring rather than guessing

You cannot taste your way to consistency, because your tolerance climbs across a production season. A sauce you judge as matching last year is usually hotter.

The cheap control is a reference sample. Keep bottles from a batch you were happy with, stored cold and dark, and taste the new batch against the old one rather than against memory. Blind if you can.

The expensive control is lab capsaicinoid analysis, which is worth it once you are selling into accounts that expect consistency.

Managing it in the recipe

Split the pepper role. Use a bulk pepper for body and flavor and a smaller quantity of a hot one for heat, then adjust only the hot component batch to batch. Adjusting the bulk pepper changes the flavor as well as the heat.

Blend across sources where you can. A batch built from two growers is less exposed to one field's season than a batch built from one.

And write down what you used. A batch record that names the source and the pick date is what lets you explain a difference a year later instead of guessing at it.

References