Blueberry and Custard Slice for Babies

Written by: Jeanette Blandford | Published on May 28, 2025

A soft, custard-like one-tray slice made with eggs, yoghurt and blueberries — packed with protein and gentle natural sweetness, and a lovely make-ahead breakfast for little ones from 6 months.

This is a really easy one tray recipe, where you literally mix all of the ingredients in the same dish you bake it in — what a win with less washing up. We love this recipe because it is full of eggs and yoghurt so it is packed full of protein and important fats. It also contains vitamins and minerals like choline, vitamin D, calcium and B12 to name a few.

This is also a dish that is suitable from 6 months old — just modify the blueberries before baking to ensure they aren't a choking risk. Great as a brekky recipe you can make ahead of time and keep in the fridge for a few days.

This dish is not very sweet (and if you use a Greek yoghurt can be tart) so if you want to add a little sweetness for older kids or adults, drizzle with maple syrup before serving.

Quick Recipe Snapshot

Prep time: 10 minutes
Cook time: 40 minutes
Makes: 1 slice tray (around 6–8 pieces)
Freezer friendly: Yes
Texture: Soft, custard-like slice

Age & Texture Guidance

Suitable from 6 months.
6–9 months: mash the blueberries through the mixture and serve in soft, easy-to-hold strips.
9–12 months: offer in soft pieces for little hands to practise their pincer grasp.
12 months+: serve as is, with a drizzle of yoghurt if you like.

Allergens Present

Egg, dairy (yoghurt) and wheat (gluten).

Allergen Substitutions

The egg and yoghurt are crucial to the custard set and can't be swapped without changing the recipe. The wheat flour can be replaced with a plain gluten-free flour blend if needed.

Why We Love This Recipe

Protein-rich from eggs and yoghurt
One-dish method with minimal washing up
A gentle way to keep offering common allergens
Make-ahead and freezer friendly for busy mornings

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Blueberry and Custard Slice

Cook and Prep Time

  • 10 minutes to put together
  • 40 minutes to cook

Ingredients

  • 4 eggs
  • 500g yogurt
  • 1/4 cup of flour
  • 1 tsp cinnamon
  • 1 tsp vanilla essence
  • ½ cup of frozen blueberries (mash for little bubs)
  • 1 very ripe banana mashed

Directions

  • Preheat the oven to 170 degrees
  • Mix all of your ingredients in a baking dish except the blueberries
  • Sprinkle the blueberries over the top
  • Bake for 40 minutes until firm and knife comes out clean
  • Allow to cool before slicing and serving
  • Keep stored in the fridge for 3 days

Storage Instructions

Keep slices in an airtight container in the fridge for up to 3 days. These also freeze well — slice first, lay pieces on a tray to freeze, then transfer to a container. Defrost in the fridge overnight and bring to room temperature, or warm gently and check the temperature before serving so it is not too hot for bub.

Nutrition Notes

Built on eggs and yoghurt, this slice offers protein and naturally occurring fats along with calcium, choline, vitamin B12 and a little vitamin D. The blueberries add antioxidants and the banana brings gentle natural sweetness without any added sugar.

Parent Tip

Choose a full-fat plain or Greek yoghurt — little ones need the extra energy that full-fat dairy provides. For older children or the adults at the table, a light drizzle of maple syrup over the top adds a touch of sweetness.

Frequently Asked Questions

Can I make this dairy free?

The yoghurt is central to the custard texture and provides much of the protein and calcium, so it cannot easily be swapped without changing the recipe. If you need a dairy-free brekky slice, our other recipes may suit better.

From what age is this suitable?

It is suitable from around 6 months. For bubs under 12 months, mash the blueberries through the mixture rather than leaving them whole to reduce the choking risk.

Why is my slice tart rather than sweet?

If you use a plain Greek yoghurt the slice will be more custardy and less sweet, which is lovely for babies. Using a very ripe banana helps, and a little extra cinnamon or vanilla lifts the flavour.

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