Rainbow Funfetti Birthday Cake

Name: Rainbow Funfetti Birthday Cake
Prep time: 25 min
Cook time: 28 min
Total time: 73 min
Yield: 14
Cuisine: British
Ingredients: 360 g plain flour; 300 g caster sugar; 1 tbsp baking powder; 0.5 tsp salt; 240 ml oat milk unsweetened; 120 ml neutral oil; 2 tsp vanilla extract; 2 tbsp apple cider vinegar; 80 g unsweetened applesauce; 90 g dairy free rainbow sprinkles (plus extra for decorating, make sure label says dairy free); 200 g dairy free block butter softened; 500 g icing sugar sifted; 3 tbsp oat milk (to 5 tbsp); 1 tsp vanilla; 1 Unit gel food colours (optional for rainbow layers); 1 Unit extra sprinkles (to decorate); 1 Unit candles (to decorate); 1 Unit fresh berries (optional to decorate)

by katplaystennis • 2026

Why some badges are missing

Not vegan: the recipe title (Rainbow Funfetti Birthday Cake) — bakes usually contain butter and egg
Not gluten-free: plain flour → try gluten-free plain flour
Not dairy-free: the recipe title (Rainbow Funfetti Birthday Cake) — bakes usually contain butter and egg
Not egg-free: the recipe title (Rainbow Funfetti Birthday Cake) — bakes usually contain butter and egg
Not low-FODMAP: plain flour → try gluten-free plain flour
Not low-histamine: apple cider vinegar
Not low-GI / diabetic-friendly: plain flour → try wholemeal flour
Not kidney-friendly: baking powder

Based on listed ingredients — always check labels for allergies.

Prep

25m

Cook

28m

Rest

20m

Serves

Rating

—

Total time · 53m

Ingredients

Kitchen Help

Shopping list

360 g plain flour
300 g caster sugar
1 tbsp baking powder
0.5 tsp salt
240 ml oat milk unsweetened
120 ml neutral oil
2 tsp vanilla extract
2 tbsp apple cider vinegar
80 g unsweetened applesauce
90 g dairy free rainbow sprinkles — plus extra for decorating, make sure label says dairy free
200 g dairy free block butter softened
500 g icing sugar sifted
3 tbsp oat milk — to 5 tbsp
1 tsp vanilla
1 Unit gel food colours — optional for rainbow layers
1 Unit extra sprinkles — to decorate
1 Unit candles — to decorate
1 Unit fresh berries — optional to decorate

Tools

· oven
· mixing bowls
· whisk
· tins
· measuring jug
· spatula

Instructions

Step by step

1
Heat oven: 180C fan 160C. Grease and line 3 x 20cm tins. If colouring layers, divide batter later.
2
Mix batter: Whisk flour, sugar, baking powder and salt. In jug whisk oat milk, oil, vanilla, vinegar and applesauce. Pour wet into dry, whisk until smooth. Fold in 60g sprinkles. Do not overmix.
3
Colour if you want rainbow: Divide batter into 6 bowls, tint pink, orange, yellow, green, blue, purple. Or keep 3 plain vanilla layers for less work, it still looks normal outside.
4
Bake: Pour into tins. Bake 22 to until skewer comes out clean. Cool in tins then on rack.
5
Frosting: Beat dairy free butter until fluffy. Add icing sugar slowly, then vanilla and oat milk until smooth and spreadable. Beat more.
6
Stack: Layer cakes with frosting between. Crumb coat thinly, chill , then coat smoothly. Press remaining sprinkles around sides and on top.