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A different take on the usual rainbow layers as this one includes a green layer which surprised us.

A good value-for-money cake that isnt too sweet or too heavy on the buttercream.

Table full of the best supermarket rainbow cakes tried and tested by GoodtoKnow�s food editor

A great base cake for those who want to personalise or add their own flair to a shopbought cake.

A super sweet flavour with defined rainbow layers.

The plain Madeira sponge is soft and moist and pairs nicely with the pastel-coloured buttercream inside.

Morrisons Rainbow Celebration Cake

My six-year-old said: I like the jam, its tasty.

A very good cake and the green layer is very cool.

This is my favourite cake.

Asda rainbow cake pack shot

Can I have another slice?

And at 14, its one of the best value-for-money cakes in this taste test.

Plus it wasnt too heavy on the icing either so wasnt overly sweet.

M&S Rainbow Layer Cake

I love the sprinkles.

The pink layer is my favourite.

A very neat rainbow cake with defined rainbow layers and colours.

Sainsbury’s Rainbow Layer Cake Taste the Difference

It looks nice and the icing is good.

The colours are clear with distinct layers and a fluffy sponge.

The kids liked this one more than me predominately because of the way it was decorated.

Tesco Rainbow Cake

My four-year-old said: I like the rainbow on top - is it chocolate?

Can I eat it?

The blue icing is good… Im just going to try some with my finger.

M&S Under the Rainbow Cake

The icing is clever and the inside with the coloured buttercream is great too.

What was your least favourite rainbow cake?

Whats the best way to cut a rainbow cake?

Collage of Morrisons Rainbow Celebration Cake being sliced to reveal rainbow layers

I like to cut my cake into squares, instead of the usual triangles.

Feeling inspired to make your ownrainbow layer cakeor how about somerainbow cupcakesto serve alongside your shopbought cake?

You might also like our list ofFrozen birthday cake ideasor your children might prefer theseBluey birthday cake ideas.

A close up of The BAKERY at ASDA Rainbow Jazzie Cake sliced with rainbow layers

Collage of images showing the M&S Rainbow Layer Cake being cut to reveal rainbow layers

Sainsbury’s Rainbow Layer Cake Taste the Difference being cut to reveal rainbow sponge layers

A collage of images of Tesco Rainbow Cake being sliced to reveal rainbow layers inside

A collage of images showing M&S Under the Rainbow Cake being cut to reveal rainbow buttercream and vanilla sponge

Three rainbow cakes cut to reveal rainbow layers lined up on a table covered in party decorations

Rainbow cake slices on a plate, taste test sheets and testers sampling cake

Black air fryer

Close up of healthier homemade gummy bears sweets

Child in school uniform eating ultra-processed chocolate breakfast cereal

Ultra processed food

Annabel Karmel�s trio of vegetables with tomato and basil

Annabel Karmel�s mini beef meatballs with carrot and apple

Woman craving sugar and eating a doughnut

A selection of foods to eat on a low sodium diet

foods high in iron

A family of all ages standing in the kitchen, cooking and eating together

mum on sofa with kids

working mum with baby in slng blurred