BakersMath BakersMath
Home / Baking Guides / 70% Sourdough
Dough Profile | Moderate Hydration

70% Hydration Sourdough Bread

A 70% hydration level is the sweet spot for home bakers. It provides enough moisture to secure an open, soft crumb structure, while keeping the dough firm enough to easily handle and shape into beautiful boules.

Dough Ingredients

g
%
g
%
%

Formula Weights 100% Adjusted

Flour to Add Adjusted for starter flour fraction
425g
Water to Add Adjusted for starter water fraction
285g
Sourdough Starter Added directly as levain
150g
Salt 2% of total flour
10g
Total Dough Weight Cumulative dough yield
870g

Starter (Levain) Breakdown 100% Hydration

Starter Flour 75g
Starter Water 75g

How it works: The sourdough starter consists of pre-fermented flour and water. To keep your recipe hydration exactly at target, we isolate these fractions and subtract them from your main flour and water additions.

Dough Ambient Temp & Proof Estimator

Fermentation speed is highly dependent on ambient kitchen temperature

°F
Est. Bulk Fermentation Optimal
4.5 hours

Standard bulk rise time for sourdough. Watch for a 30-50% growth in volume before shaping.

Stretch & Fold Chime

Stay on schedule for gluten-building fold intervals

30:00

Methodology

This method is optimized for typical kitchen temperatures (72–76°F / 22–24°C). The 70% hydration formula utilizes a 20% prefermented flour ratio (100g sourdough starter at 100% hydration relative to 500g total flour), which ensures a steady bulk fermentation time of 4.5 to 5 hours.

01. Mixing & Autolyse

Mix the adjusted flour (425g) and adjusted water (275g) in a large bowl. Let stand for 45 minutes. Dimple in the 100g starter and 10g salt. Squeeze the dough to incorporate.

02. Gluten Structure Building

Perform 4 sets of Stretch & Folds. Do a set every 30 minutes. You will notice the dough transitioning from a shaggy paste to a smooth, shiny, elastic mass.

03. Shaping & Cold Sleep

Pre-shape into a loose round. Rest on the counter for 20 minutes (bench rest). Do the final shape to create surface tension, dust with rice flour, place in your proofing basket, and store in the fridge overnight.

Typical Baking Schedule

09:00 AM
Feed Starter Feed 1:1:1 to peak in 4-5 hours.
01:00 PM
Autolyse Combine flour and water; rest.
01:45 PM
Mix Dough Add starter and salt. Squeeze.
02:15 PM
Stretch & Folds 4 sets spaced 30 min apart.
04:15 PM
Bulk Rise Let sit undisturbed until puffy.
06:30 PM
Shape & Fridge Shape, place in banneton, chill.
Next Morning
Bake Dutch oven at 450°F (20 min lid on, 20 lid off).

Folding Techniques

Strengthen the dough step-by-step

Dough Manipulation Guide

Step-by-step techniques to develop gluten structure and surface tension

Step 1: Stretch & Fold

The foundation of no-knead sourdough. Reach down to the bottom of the bowl, grab one quadrant of the dough, gently lift it upwards until you feel resistance, and fold it over the center. Rotate the bowl 90 degrees and repeat for all four sides.

Timing & Frequency Perform 3-4 sets during the first 2 hours of bulk fermentation, spaced 30 minutes apart. Develops early gluten alignment without tearing.