How to Make Custard: Delia Smith’s Easy Recipe Guide

There’s a reason custard remains the definitive finishing sauce for British puddings — that silky, vanilla-scented blanket transforms a plain sponge or fruit crumble into something genuinely memorable. The good news: it’s far simpler than its reputation suggests. With just a handful of ingredients and one key technique borrowed from Delia Smith, you can make flawless custard at home every time.

Key ingredients: milk, egg yolks, sugar, cornflour · Prep time: 10 minutes · Cook time: 10 minutes · Servings: 4 · Difficulty: Easy

What are the basic ingredients of custard?

The foundation of any proper custard comes down to four elements: a liquid base, yolks for richness, sugar for sweetness, and vanilla for flavour. Where you go from there determines texture and richness.

Milk or cream base

Double cream produces the richest, most indulgent custard. You can lighten it by swapping half the cream for milk, or use all milk for a much thinner sauce (Riham’s Messy Kitchen). Delia Smith’s classic recipe uses 570ml of double cream (Delia Smith Recipes), which yields a proper pouring consistency that sets beautifully when cooled.

Egg yolks for thickening

Six large egg yolks provide the structure and richness that makes custard distinctly custard. The yolks emulsify with the hot liquid, creating that characteristic silky texture that no substitute quite replicates. For a baked egg custard, Delia preheats the oven to 160°C (140°C fan) and uses a water bath (Delia Smith Recipe).

Sugar and vanilla for flavour

50g of golden caster sugar sweetens the mixture without grit. One dessertspoon of vanilla extract — or a vanilla pod if you prefer — fills the kitchen with that unmistakably warm aroma (Delia Smith Recipes). These aren’t optional additions; they define the flavour profile of a proper British custard.

Cornflour option

Here’s Delia’s secret weapon: one level dessertspoon of cornflour acts as an insurance policy against curdling (Delia Smith Recipes). It activates at a gentle simmer and thickens without the scramble-risk that pure egg custard carries. As Delia herself says in her video lesson, “that little bit of magic cornflour will always do the trick” (YouTube Delia Official).

How to make custard step by step?

The method breaks into three distinct stages: heating the liquid, tempering the egg mixture, and thickening on the stove. Getting each stage right is what separates silky custard from scrambled eggs.

Heat milk and cream

Place your cream (and milk if using) in a heavy-gauge aluminium saucepan — Delia emphasises this equipment choice for even heat conduction (YouTube Delia Official). Heat gently, stirring occasionally with a wooden spoon, until just below simmering point. Tiny bubbles forming at the edges is the signal; don’t let it boil.

Whisk yolks with sugar and cornflour

While the cream heats, crack six large egg yolks into a mixing bowl. Add 50g golden caster sugar, one level dessertspoon cornflour, and one dessertspoon vanilla extract. Use a balloon whisk — not a fork — to beat everything smooth (Delia Smith Recipes). Delia recommends placing the bowl on a damp cloth to steady it during whisking.

Temper and thicken

This is where most home cooks hesitate: slowly pour the hot cream into the egg mixture while whisking constantly — this is tempering, and it prevents the eggs from cooking into scrambled eggs the moment they meet heat. Once combined, return everything to the saucepan over gentle heat and keep whisking until it thickens (Delia Smith Recipes). The mixture thickens at a gentle simmer, not a rolling boil.

Cool and serve

Once the custard coats the back of a spoon, remove it from heat immediately. Cover the surface directly with clingfilm to prevent skin forming — press it right onto the custard surface. It will thicken further as it cools and sets firm in the fridge (Delia Smith Recipes). Serve warm over crumble, or chill for trifle.

How to make a homemade custard?

Homemade custard starts with the classic egg-based method, refined over decades by British cooks. Delia Smith’s approach has become the benchmark for home cooks seeking that restaurant-quality silkiness.

Classic egg-based method

Delia Smith’s custard recipe, featured in her cooking lesson on custards and meringues, calls for 570ml double cream, 6 large egg yolks, 50g golden caster sugar, 1 level dessertspoon cornflour, and 1 dessertspoon vanilla extract (Delia Smith Recipes). The method uses a heavy-gauge aluminium saucepan for even heat distribution and a balloon whisk for the egg mixture (YouTube Delia Official).

Avoiding lumps

Lumps form when hot liquid hits the eggs too quickly. The tempering step — pouring gradually while whisking — prevents this entirely. If lumps do appear, a stick blender will smooth them out (YouTube Keto Kitchen). The cornflour also helps, as it thickens before the eggs can curdle.

Stovetop tips

Delia demonstrates the technique in her video: place the mixing bowl on a damp cloth to steady it while you work. When the mixture returns to the pan, whisk constantly to avoid scrambling. The moment it thickens to a coating consistency, remove from heat — even a few seconds too long risks the eggs seizing (Delia Smith Recipes).

How to make custard with custard powder?

Custard powder offers a shortcut that bypasses the egg-tempering dance entirely. It’s a useful technique when you need speed or when eggs aren’t available.

Mix powder with sugar

Combine 2-3 tablespoons of custard powder with an equal amount of sugar in a bowl. Add a splash of cold milk — just enough to form a smooth, pourable paste with no lumps (Riham’s Messy Kitchen). This step is crucial: adding powder directly to hot liquid guarantees graininess.

Add to hot milk

Heat 500ml of milk until just below boiling. Pour the hot milk gradually into the custard paste, whisking constantly. Then return the combined mixture to the saucepan over medium-low heat (Riham’s Messy Kitchen). The powder thickens quickly — stir continuously to avoid hotspots.

Stir constantly

Custard powder thickens within 2-3 minutes of cooking. Keep stirring, especially around the sides and base of the pan where it catches first. Once it reaches your desired consistency, remove from heat and cover as usual (Riham’s Messy Kitchen). It won’t achieve the same silkiness as an egg-based custard, but it will be smooth and reliable.

How to make custard without eggs?

Egg-free custard relies on cornflour as the sole thickener. It’s simpler in some ways — no tempering, no scramble risk — but requires attention to cooking technique.

Cornflour thickening

Use approximately 2 teaspoons of cornflour per 500ml of liquid. Mix the cornflour with a small amount of cold milk first to create a smooth paste — this prevents graininess when it meets heat (Riham’s Messy Kitchen). Cornflour activates at around 85°C, so medium-low heat is sufficient.

Custard powder method

Custard powder is essentially cornflour with added flavouring and colour, so the method mirrors the powder approach above. Mix 2-3 tablespoons with cold milk, add hot milk, then cook until thickened (Riham’s Messy Kitchen). This produces a smooth result without eggs.

Vegan options

Substitute plant-based milk (oat or soy work best for texture) for dairy milk, and use a plant-based butter or oil for any fat content. The technique remains the same: cornflour paste plus hot milk, cooked to thicken. Vegan custard won’t have the richness of egg-based versions, but it serves well as a dairy-free dessert sauce.

Steps for making custard at home

Following these steps in sequence will give you a smooth, lump-free custard every time. The recipe serves 4-6 people from a single batch.

• Step 1: Gather equipment. Heavy-gauge saucepan, balloon whisk, mixing bowl, damp cloth, clingfilm.
• Step 2: Mix the egg base. Crack 6 large egg yolks into a bowl. Add 50g golden caster sugar, 1 level dessertspoon cornflour, and 1 dessertspoon vanilla. Whisk smooth.
• Step 3: Heat the cream. Pour 570ml double cream into the saucepan. Heat gently, stirring occasionally, until just below simmering — tiny bubbles at edges only.
• Step 4: Temper the eggs. Slowly pour hot cream into the egg mixture while whisking constantly. This is critical: never rush this step.
• Step 5: Return to pan. Pour the tempered mixture back into the saucepan over medium-low heat. Whisk continuously.
• Step 6: Thicken. The mixture thickens at a gentle simmer. Remove from heat the moment it coats a spoon — typically 2-3 minutes of careful attention.
• Step 7: Cool and cover. Press clingfilm directly onto the surface to prevent skin. Serve warm, or chill for later use.

“The greatest English source of all — this is the real deal homemade custard made with cream and egg yolks.”

— Delia Smith, Chef (YouTube Delia Official)

“That little bit of magic cornflour will always do the trick. If you just take it away from the heat, go on whisking with your whisk, it will always come back smooth.”

— Delia Smith, Chef (YouTube Delia Official)

“Custard freezes really well.”

— Delia Smith, Chef (YouTube Delia Official)

“It’s a cheat from the great Delia Smith, and it works.”

— Riham, Blogger (Riham’s Messy Kitchen)

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