Sourdough Zucchini Bread: A Late Summer Favorite

Short answer: grate 300g zucchini, squeeze out excess water, mix with active starter and a quickbread base. The zucchini disappears into the crumb but adds moisture and tenderness.

This is the bread to bake when your garden produces too many zucchini in August.

The recipe

For one 9x5 loaf:

• 300g zucchini, grated (about 1 medium)
• 100g active starter
• 200g flour (mix of bread + whole wheat)
• 100g sugar (white or brown)
• 80g neutral oil
• 2 large eggs
• 1 tsp vanilla
• 1 tsp salt
• 1 tsp cinnamon
• 1/2 tsp nutmeg

Optional add-ins:

• 100g chopped walnuts
• 80g chocolate chips
• 50g raisins
• Lemon zest

Method

Prep zucchini

Grate the zucchini. Place in a clean kitchen towel. Squeeze hard to remove water (about 100ml will come out).

This step is critical. Wet zucchini = soggy bread.

Mix

In a bowl, combine zucchini, starter, sugar, oil, eggs, vanilla.

Add flour, salt, spices. Stir until just combined.

Fold in nuts/chips/raisins.

First rise

Cover. Let rise at room temperature 8–10 hours.

Bake

Pour into greased 9x5 loaf pan.

Bake at 350°F for 55–60 min, internal temp 200°F.

Cool 30 min in pan. Then cool fully on rack.

Why squeeze the zucchini

Unsqueezed zucchini:

• Releases water during baking
• Makes a wet, gummy bread
• Doesn't bake through

Squeezed zucchini:

• Adds moisture without sogginess
• Disappears into the crumb
• Lets the bread bake properly

Always squeeze. Save the water for your starter or a soup.

Variations

Chocolate zucchini bread

Add 50g cocoa powder. Add 80g chocolate chips. Tastes like chocolate cake.

Lemon zucchini bread

Add zest of 2 lemons. Add 1 tbsp lemon juice. Brighten everything.

Apple zucchini

Replace 100g of zucchini with grated apple.

Carrot zucchini

Replace 100g zucchini with grated carrot.

Spice cake

Increase cinnamon to 2 tsp + 1 tsp ginger + 1/2 tsp clove.

Streusel topping

Mix 50g flour + 50g brown sugar + 30g butter. Sprinkle before baking.

Storage

Zucchini bread keeps:

• Counter, cloth bag: 3 days
• Refrigerated: 1 week
• Frozen, wrapped: 3 months

Often best on day 2 (flavors meld).

A morning use

Toast a slice. Top with:

• Cream cheese
• Or butter and honey
• Or yogurt and berries

Zucchini bread for breakfast feels healthy (it has vegetables) and tastes like dessert.

Why this works for sourdough

The slow ferment (8+ hours):

• Develops flavor
• Tenderizes the wheat
• Adds slight tang
• Improves keeping

Quickbread zucchini bread is fine. Sourdough is more interesting.

Using larger zucchini

If your garden produced a 12-inch zucchini (it happens):

• Cut in half lengthwise
• Scoop out the seedy center (which is bitter)
• Grate the firm flesh
• Use 300g

The huge zucchini that hide under leaves are actually fine for bread; just remove the seeds.

A double batch

For meal prep or gifting:

• Double everything
• Bake in two 9x5 pans
• One for now, one for the freezer
• Or one to give

This recipe scales easily.

A chocolate version

For a treat:

• 200g zucchini
• 100g starter
• 200g flour + 30g cocoa
• 150g sugar
• 80g oil
• 2 eggs
• 100g chocolate chips
• 1 tsp baking soda + 1 tsp baking powder (for faster rise)
• Skip the long ferment if using soda

Bake at 350°F for 55 min.

This is closer to chocolate cake. Excellent.

What to do with too much zucchini

• Bake this bread (4 zucchini → 4 loaves, freeze)
• Spiralize for "zoodles"
• Grill in slices with olive oil
• Make zucchini fritters
• Stuffed zucchini boats
• Give to neighbors

A productive zucchini plant feeds a family for weeks.

Cost analysis

Zucchini bread:

• Free zucchini (garden)
• Other ingredients: $4
• Total: $4 for a 12-slice loaf

Or in season:

• Zucchini at farmers market: $1
• Total: $5

Either way, much cheaper than bakery zucchini bread.

A summer staple

When zucchini is in season:

• Bake zucchini bread weekly
• Use up the harvest
• Snack all week
• Toast for breakfast

This becomes a summer ritual.

A note on grating

Use the large holes of a box grater:

• Coarse texture (visible flecks in the bread)
• Easy to do
• No food processor needed

Fine grating disappears too completely. Coarse leaves character.

A final tip

Sourdough zucchini bread is a great way to:

• Use up zucchini
• Make breakfast bread
• Practice quickbread sourdough
• Share with friends

Bake one. Slice. Toast. Spread butter. Enjoy.

It's the easiest way to feel smug about your garden.