Guide to biga: the indirect dough that transforms homemade pizza and bread

La biga is one of the most effective pre-ferments developed by Italian baking. It isn't a professional laboratory technique: with one day of advance planning and very few ingredients, anyone can make it at home and radically transform the structure and aromatic profile of their doughs. You don't add a variable — you change the way flour, water and yeast interact over time.

This guide covers everything you need: what biga is, why it works, how to make it, how to manage temperature and maturation, how to incorporate it into the final dough and what to expect from the result.

What biga is and how it differs from other pre-ferments

Biga is a low-hydration, firm pre-ferment: it's made with strong flour, cold water (44–50% of the weight of the flour used in the biga) and a very small percentage of baker's yeast (0.3–1%). It is left to ferment at a controlled temperature for 16–24 hours before being incorporated into the main dough.

The difference compared to other common pre-ferments is substantial:

| Pre-ferment | Hydration | Yeast used | Typical time | Aromatic profile | |---|---:|---|---:|---| | Biga | 44–50% | 0.3–1% baker's yeast | 16–24 hours | Rustic, toasty, balanced | | Poolish | 100% | 0.1–0.5% baker's yeast | 8–12 hours | Sweet, light, forward | | Sourdough starter | variable | stable microbial culture | 18–36 hours | Complex, lactic, mildly acidic |

Poolish works at full hydration, ferments faster and gives sweeter, more delicate notes. Biga, being firm, slows fermentation and develops aromatic depth without strong acidity. A sourdough starter requires constant maintenance but offers the most complex profile. Biga is the most practical middle ground: long times, deep results, simple handling.

How to make biga

A 60% biga means that 60% of the total flour of the final dough goes into the biga. The remaining 40% is added to the main dough together with the remaining water.

Ingredients for the biga (based on 1 kg of total flour, biga at 60%):

• 1 lb 5 oz (600g) strong flour, W330–380 (high-strength flour)
• 9½ oz (264g) cold water (44% of the biga flour weight)
• 0.06–0.21 oz (1.8–6g) dry baker's yeast (0.3–1% depending on room temperature)

Procedure:

1. Dissolve the yeast in the cold water — in summer use water at 57–61°F (14–16°C) to compensate for ambient heat.
2. Pour the water over the flour and mix briefly. Biga should not be kneaded for long: the goal is to hydrate all the flour, not to develop the gluten network. Lumps may remain: this is normal and correct.
3. Cover with plastic wrap and allow to mature according to the table below.

Table: room temperature and biga maturation time

| Temperature | Dry baker's yeast | Maturation time | Practical notes | |---|---:|---:|---| | 57–61°F (14–16°C) (cellar or top fridge shelf) | 1.0% | 20–24 hours | Slow maturation, finer aromas | | 16–