Who each format suits

Convenience-first sharers

For a TV-dinner dessert served to several people, a ready-to-serve 1kg carton avoids making custard from powder. ASDA Groceries describes its Ambrosia 1kg carton as eight servings; Tesco Groceries and Sainsbury’s also list sharing-size cartons.

Small-household dessert buyers

For one or two diners, a smaller pack may be easier to finish. Marks & Spencer lists its M&S Silky Smooth Custard in a 400g tin, with instructions to refrigerate it and eat it within two days of opening.

Customisation-focused cooks

Bird’s Original Custard Powder suits people willing to heat and stir custard so they can adjust the milk, sugar and thickness. Bird’s says the powder may contain milk, even when prepared with an alternative milk.

What matters when choosing

For a shared TV-dinner dessert, start with the number of portions you need, then decide whether using up an opened pack or preparing custard yourself matters more.

Concern What to check Who this matters to
Enough custard to share Check the net weight and stated servings. ASDA Groceries describes the Ambrosia 1kg carton as eight servings; Sainsbury’s specifies eight 125g servings for its 1kg carton. When several of us are eating, I want custard ready to serve without making another part of dinner. About 50% of consumers put ready-to-serve sharing quantity first.
Leftovers after opening Match the pack size to your diners and read its post-opening instructions. The listed 1kg Ambrosia, Tesco and Sainsbury’s cartons specify refrigeration and use within three days; the M&S 400g tin specifies two days. If only one or two of us want dessert, I would rather open a smaller pack than plan around a large remainder. Pack size and leftovers are the primary concern for about 30% of consumers.
Control over preparation Check the powder’s preparation directions and allergen statement. Bird’s describes ways to vary the milk, sugar and consistency, but says its powder may contain milk. I am willing to make custard if I can adjust it to the dessert we are serving. About 20% of consumers prioritise that preparation control.

Pack and storage mistakes to avoid

  • Assuming “tinned custard” means a sharing-size tin

    The listed 1kg sharing options from Ambrosia, Tesco and Sainsbury’s are cartons, while the listed M&S tin is 400g. The category name alone does not tell you how much custard you are buying.

    Check the pack format, net weight and serving guide before choosing custard for a group.

  • Using the same storage rule for every opened pack

    Post-opening instructions differ: the listed Ambrosia, Tesco and Sainsbury’s 1kg cartons specify refrigeration and use within three days, while the M&S 400g tin specifies two days.

    Follow the instructions on the exact pack and plan when you will use any remainder.

  • Assuming alternative milk makes custard powder milk-free

    Bird’s suggests preparing its powder with coconut or almond milk, but also states that the powder may contain milk.

    If milk must be avoided, check the allergen statement on the exact pack rather than relying on the liquid used to prepare it.

Brands and retailers to consider

Ambrosia

ASDA Groceries lists Ambrosia Devon Custard Dessert in a ready-to-serve 1kg carton described as eight servings.

  • The listed carton can be served hot or cold, with heating instructions provided.
  • It contains milk; once opened, the listed carton must be refrigerated and consumed within three days.

Tesco

Tesco Groceries lists Tesco Ready To Serve Custard as a 1kg UHT carton.

  • The listed custard can be served hot or cold.
  • It contains milk and must be refrigerated and used within three days of opening.

Sainsbury’s

Sainsbury’s lists its Ready To Eat Custard in a 1kg carton with eight 125g servings.

  • The listing provides hot and cold serving options, with microwave and hob guidance.
  • It identifies milk in the ingredients and says to refrigerate after opening and consume within three days and by the date shown.

Asda

ASDA Groceries lists the Ambrosia Devon Custard Dessert 1kg carton. This is a retail option for Ambrosia custard, not an Asda own-label example.

  • The listed carton is described as eight servings and ready to serve.
  • It contains milk and requires refrigeration and use within three days after opening.

M&S

Marks & Spencer lists M&S Silky Smooth Custard in a 400g tin, a smaller format than the 1kg cartons above.

  • The smaller pack may suit a dessert for one or two diners.
  • It contains milk and must be refrigerated and eaten within two days of opening.

Bird’s

Bird’s Original Custard Powder is a make-it-yourself option rather than ready-to-serve custard.

  • Bird’s gives preparation options for adjusting the milk, sugar and thickness.
  • Preparation requires heating and stirring. The powder may contain milk, and prepared custard should be refrigerated and treated as fresh food.

Joybuy custard selection

This Joybuy selection is a 1kg Ambrosia custard for a planned shared dessert. Check the current pack for serving guidance and preparation instructions before choosing it for your table.

Ambrosia Light Devon Custard 1kg

Ambrosia Light Devon Custard 1kg

The 1kg pack is an option when you are planning custard for a shared dessert. Check how many portions you intend to serve; also check the exact pack’s milk allergen statement, serving directions and storage instructions after opening.

View on Joybuy

Custard questions

How many people does a 1kg carton serve?

Check the serving guide on the carton: Sainsbury’s lists eight 125g servings for its 1kg custard, and ASDA Groceries describes the Ambrosia 1kg carton as eight servings. The amount you use per person may differ when custard accompanies another dessert.

Can ready-to-serve custard be eaten cold?

The listed Ambrosia, Tesco and Sainsbury’s sharing cartons can be served hot or cold. If heating custard, follow the instructions on the exact pack, including its stirring and heating directions.

How long does opened custard keep?

Follow the exact product label. The listed 1kg Ambrosia, Tesco and Sainsbury’s cartons say to refrigerate after opening and consume within three days; the listed M&S 400g tin says to refrigerate and eat within two days.

Is custard powder suitable if I avoid milk?

Do not assume it is. Bird’s says its Original Custard Powder may contain milk, even though it provides directions for using coconut or almond milk. Check the allergen statement on the exact pack if milk needs to be avoided.

Is a best-before date the same as a use-by date?

No. GOV.UK explains that a best-before date concerns food quality, while a use-by date concerns safety. Check which date appears on your custard and follow the pack’s storage instructions, including any directions that apply after opening.