Name: Chocolate zucchini cake
Yield: 1 sheet cake, about 16 portions
Cuisine: United States
Ingredients: 115 g Unsalted butter Soft; 100 g Neutral oil; 350 g Caster sugar; 5 mL Alcohol-free vanilla flavouring; 5 mL Baking powder; 2.5 mL Baking soda; 2.5 mL Fine salt; 2 Large eggs; 300 g All-purpose flour; 65 g Cocoa powder Natural or Dutch-process; 115 g Sour cream; 400 g Zucchini Grated; do not squeeze; 85 g Chocolate chips

Method

01 · Prepare
5 min
Use: Equipment
Heat the oven. Grease and line one 23 × 33 cm tin.
Ready when: Pan ready before mixing.
01 PrepareGrease and line the 23 × 33 cm tin.
02 · Beat
3 min
Use: Cream, Eggs
Beat creaming group smooth, then beat in eggs.
Ready when: Emulsified mixture.
02 BeatBeat the creaming ingredients smooth, then add the eggs.
03 · Combine
2 min
Use: Beat, Dry, Dairy, Fruit
Add flour and cocoa alternately with sour cream. Fold in zucchini and chocolate chips.
Ready when: Moist, even batter.
03 CombineFold in the grated zucchini and chocolate chips.
04 · Bake
40–45 min
Use: Combine
Transfer to the prepared pan and bake.
Ready when: Centre springs back; skewer has crumbs, not wet batter.
04 BakeBake until the centre springs back and a skewer has crumbs.
05 · Cool
About 2 hours
Use: Bake
Cool in the tin on a rack.
Ready when: Set throughout.
05 CoolCool the cake in its tin on a rack.

What to look for

Stage	Look / feel for	Needs attention
Combine	Moist, even batter.	Stop at this cue rather than relying only on elapsed time.
Bake	Centre springs back; skewer has crumbs, not wet batter.	Stop at this cue rather than relying only on elapsed time.
Cool	Set throughout.	Stop at this cue rather than relying only on elapsed time.

Troubleshooting

If you see this	Likely cause	What to do now	Next time
Sunken centre	The batter was underbaked or lost too much air.	If still in the oven, continue until the centre is set.	Use the stated pan and avoid opening the oven early.
Dry crumb	Excess flour or baking time.	Serve with an appropriate cream or filling.	Weigh flour and check doneness at the low end of the range.

Store covered for 3 days in a cool room, or freeze.

Ingredient choices & substitutions

Ingredient	Specified type	Brand	Status
Unsalted butter	Soft	No required brand	Match the ingredient type
Cocoa powder	Natural or Dutch-process	No required brand	Match the ingredient type
Zucchini	Grated; do not squeeze	No required brand	Match the ingredient type

Ingredient	Alternative / ratio	Adjust handling	Likely outcome
All-purpose flour	Plain wheat flourEqual weight	Use plain flour, not self-raising; mix only until combined.	Similar result; stronger bread flour produces a firmer crumb.

Match the ingredient’s function and weight. See the flour, gluten, yeast and salt guide.

Other approaches to this recipe

Cook / recipe	Use	What differs

The working ingredients and method form one recipe. Different formulas are compared without averaging their quantities or rise schedules.

Recommended Tools Regular Baker	Casual Baker Workarounds Hacks
Digital kitchen scale	Borrow a suitable scale for the gram amounts. Use measuring cups only where a volume is provided; fluff flour, spoon it in and level without packing.
Measuring spoons and a marked jug	Use standard measuring spoons for small volumes and a kitchen measuring jug for liquids; eating spoons vary in size.
One 23 × 33 cm baking tin	Use an existing pan of the same dimensions, depth and material where possible. A different size changes thickness and cooking time; do not fill a smaller pan with the full batch.
Bowls	Use a clean food-safe bowl with enough headroom for mixing or rising. For whipped whites, keep it free of grease.
Spatula	Use a flexible food-safe scraper or a flat spoon suited to the task; choose heat-resistant tools for hot pans.
Cooling rack	Set a clean, cool wire trivet over a tray. Let air reach underneath; a flat plate can trap steam.

Recommended Tools Regular Baker	Casual Baker Workarounds Hacks
Digital kitchen scale	Borrow a suitable scale for the gram amounts. Use measuring cups only where a volume is provided; fluff flour, spoon it in and level without packing.
Measuring spoons and a marked jug	Use standard measuring spoons for small volumes and a kitchen measuring jug for liquids; eating spoons vary in size.
One 23 × 33 cm baking tin	Use an existing pan of the same dimensions, depth and material where possible. A different size changes thickness and cooking time; do not fill a smaller pan with the full batch.
Bowls	Use a clean food-safe bowl with enough headroom for mixing or rising. For whipped whites, keep it free of grease.
Spatula	Use a flexible food-safe scraper or a flat spoon suited to the task; choose heat-resistant tools for hot pans.
Cooling rack	Set a clean, cool wire trivet over a tray. Let air reach underneath; a flat plate can trap steam.

Chocolate zucchini cake

Chocolate zucchini cake