There is nothing I like better than dunking a custard cream into a mug of hot tea, which is why this British biscuit is always at the top of my shopping list. It is also one of my Dad's favourite treats, so I always end up buying a packet of custard creams every time I visit my parents.

Having eaten so many over the years, I think I have become a custard cream connoisseur, which inspired me to buy packets from a variety of supermarkets to see how they compared. I tracked down the store-brand custard creams from Tesco, Aldi, Lidl, Sainsbury's, M&S and even Waitrose to discover which one truly deserves the title of Britain's best biscuit.

7. Tesco

The Tesco custard creams were the most expensive out of all the other biscuits I bought at 65p, but you did get a big 400g packet. One biscuit was 59 calories and contained 3.4g of sugar.

After eating a Tesco one, I felt there was nothing much to say about it as it seemed a bit flavourless, and I did not think you got a lot of buttercream compared to the other biscuits. I also decided to do a dunk test with these biscuits, and they fell apart after eight to 10 seconds, so they are not great to have with a cup of tea.

6. Morrisons

Morrison's custard creams were 60p, the second-most-expensive packet after Tesco, but you also got 400g of biscuits. One biscuit was 58 calories and contained 3.4g of sugar.

After trying out the Morrison ones, I felt they were just as bland as the Tesco ones. They were just boring to eat and also broke apart very easily in about five seconds when I tried dunking one.

Unfortunately, quantity won over quality with these biscuits as they were a lot weaker compared to all the other custard creams.

5. Marks and Spencer

Marks and Spencer's custard creams cost 50p, and you get 165g of biscuits inside the packet. One biscuit was 71 calories and contained 5.7g of sugar.

I think the M&S biscuits looked the best as they were the deepest golden colour and had the supermarket brand stamped on them. However, they were far too sweet and overpowering to the point I felt I could not finish the biscuit. It might be down to individual preference, but they were overly sugary for me, and I do not think I would buy them again.

The M&S custard creams were also the soggiest biscuits as they instantly fell apart when I tried to dunk them in tea.

4. Aldi

Aldi's custard creams cost 45p, and you get 300g of biscuits in the packet. One biscuit was 64 calories and contained 3.3g of sugar.

These biscuits were tasty and sweet without being sickly. I really enjoyed them, but the only downside was that they were a little crumbly, and I ended up getting a lot of the biscuit down my clothes while trying to eat them.

I would perhaps not recommend eating these biscuits without a napkin, but despite the crumbs, they passed the dunk test perfectly and stayed intact throughout an entire cup of tea.

3. Lidl

The Lidl's custard creams were 45p for 300g biscuits in the packaging. One biscuit was 65 calories and contained 3.4g of sugar.

These biscuits were tasty, but simply did not stand out compared to the top two packets of biscuits, which is why I have put them in third place.

2. Waitrose

Waitrose was the same price as the Aldi and Lidl custard creams at 45p, but you got less for your money compared to the other biscuits, as the packet contained only 150g. One biscuit was 62 calories and contained 3.9 of sugar.

What I liked about the Waitrose biscuits was the generous layer of buttercream, which made them quite indulgent. These biscuits were very rich and also passed the dunking test, staying perfectly firm as I ate them with a cup of tea.

1. Sainsbury

Sainsbury's custard creams were the cheapest out of the whole lot at 40p, and you got 200g worth of biscuits in the package. One biscuit was 59 calories and contained 3.3g of sugar.

I loved the Sainsbury biscuits because they had a good crunch when you bit into them. They were really buttery without being overly sweet, and they stayed intact throughout an entire cup of tea when I dunked them.

These custards stood out to me because they had the perfect snap, even after softening from the tea, and the right ratio of biscuit to filling.

I would definitely go out of my way to buy them again, as no other custard cream on this list compares in terms of texture.

Overall thoughts

After buying all these custard creams, I did not want to waste food, so I took them over to my parents' house over the Easter holiday weekend, where they were quickly devoured by various family members.

The Sainsbury's packet was the first to be completely eaten, followed by the Waitrose one, so I am quite confident in my assessment that these supermarkets have the UK's best custard creams and are also the cheapest you can buy.

Overall, I think Sainsbury's was the clear winner because it has the perfect ratio of custard cream while having a really nice biscuit, but Waitrose is fantastic if you want something a little richer.