How Many Syns in Apple Crumble and Custard? Find Out with Slimming World Recipes

Updated on 
14 August, 2025

How Many Syns in Apple Crumble and Custard? Syn Guide + Low Syn Recipes

If you fancy a dessert after dinner you have to make sure your track its syns for your sweet treat not to affect your weight loss.

One slice of apple and crumble could cost you between 11 syns and 13 syns which is very high in syns and custard has around 6 syns a serving so could use around nearly your whole daily allowance. 

In our guide below we will discuss whether or not you can eat apple crumble on the slimming world diet, how many syns some popular branded apple crumbles have as well as a slimming world crumble and custard recipe if you feel like getting creative in the kitchen!

Can I Eat Apple Crumble & Custard On The Slimming World Plan?

Although apple crumbles are high in syns you can still eat it on the slimming world diet as long as you have enough allowance for it, although it will consume most of your allowance once paired with custard.

We would suggest having a smaller portion of crumble if you want to save syns and ensure you measure out your custard to keep within your syn allowance.

Syn Values Of Apple Crumbles

Apple crumbles syns vary according to different brands, we've listed a few popular ones for you to check out below.

  • Deliciously Ella blackberry and apple crumble - 13 syns per portion.
  • Sainsbury's Be Good To Yourself apple and blackberry crumbles - 10 syns per crumble.
  • Mr Kipling custard, apple and pear crumble tarts - 10.5 syns a tart.
  • Tesco free from caramel apple crumble tarts - 8 syns a tart.
  • ASDA traybake apple crumbles - 14 syns a slice.
  • Sainsbury's Bramley apple crumble - 15.5 syns per crumble.
  • Sainsbury's Free From apple crumble slices - 7 syns a slice.
  • ASDA Free From apple crumble pies - 8 syns a pie.
  • Aunt Bessie's apple pie - 18 syns a portion.
  • Morrison's apple crumbles (family version) - 17.5 syns a slice.
  • ASDA basic apple crumble - 14 syns a slice.
  • Morrison's small apple crumbles - 17 syns per crumble.
  • Morrison's basic apple crumble - 14.5 syns a slice. 

Syn Values Of Custard

Custard typically has a syn value between 4-6 syns but can vary according to the brand, to help you out, we've bullet-pointed a few of the popular ones down below to help you stay on track.

  • Ambrosia Devon Custard 1Kg - 6 syns a serving.
  • Ambrosia Light Devon Custard - 5 syns a serving.
  • Tesco Finest Custard 500G - 11.5 syns for 1/4 a pot.
  • Tesco Light Custard Ready To Serve 1Kg - 5 syns a serving.
  • Tesco Fresh Custard 500G - 6 syns per serving.
  • Birds Traditional Custard Powder 350G - 7 syns a serving.
  • Ambrosia Deluxe Custard 400G - 8 syns a serving.
  • Alpro Vanilla Soya Custard 525G - 3.5 syns a serving.
  • Oatly Vanilla Custard 250Ml - 8.5 syns for 100ml.

Slimming World Friendly Apple Crumble & Custard Recipes

If you’re looking for a comforting dessert that’s low in Syns, these Slimming World apple crumble and custard recipes are perfect for satisfying your sweet tooth without going off-plan. By making them at home, you can control the ingredients, cut back on sugar, and enjoy a guilt-free treat.

Below, you’ll find two Slimming World dessert recipes – one for a fruity apple crumble and another for a smooth, creamy custard – both easy to make and family-friendly.

Slimming World Low Syn Apple Crumble Recipe

apple crumble

Ingredients:

  • 55g dessert apples, peeled and sliced
  • 1 tsp cinnamon
  • 180g fat-free fromage frais
  • Grated zest and juice of 1 orange
  • 4 tbsp sweetener
  • 115g self-raising flour
  • A few drops of vanilla extract
  • 45g low-fat spread, melted

Method:

  1. Preheat your oven to Gas Mark 6 (200°C / 400°F).
  2. Place the apples in an ovenproof dish along with the orange zest, juice, cinnamon, and half of the sweetener.
  3. In a separate bowl, combine the flour and remaining sweetener, then pour in the melted low-fat spread. Mix until the texture becomes crumbly.
  4. Sprinkle the crumble topping over the apples.
  5. Bake for around 30 minutes until golden and crisp.

Slimming World Low Syn Custard Recipe

SW Custard Recipe

Ingredients:

  • 500ml skimmed milk
  • 3 egg yolks
  • 5 tbsp granulated sweetener
  • 1 tsp vanilla extract
  • 1 tbsp cornflour

Method:

  1. In a jug, whisk together the egg yolks, sweetener, vanilla extract, and cornflour.
  2. Heat the milk in a saucepan over medium heat until steaming (but not boiling).
  3. Slowly pour the hot milk into the egg mixture while whisking continuously to prevent curdling.
  4. Return the mixture to the pan and cook on a low heat for about 15 minutes, stirring constantly until thickened.

Tip: Serve your apple crumble warm with a drizzle of homemade custard for a delicious Slimming World dessert that feels indulgent but fits perfectly into your daily Syn allowance.

Final Words

Overall, apple crumbles and custard is very high in syns so should only be had occasionally as a treat now and then, to save even more syns you should also consider making your apple crumble and custard with our slimming world recipes above.

Jennifer
Jennifer is a certified nutritionist and weight loss coach with a Master's in Nutrition from Cambridge. With over 10 years experience, she shares healthy recipes and science-backed slimming tips on SheCooksSheEats to help people reach their wellness goals. Jennifer stays up-to-date by regularly attending conferences and continuing her nutrition education. She aims to provide research-backed advice to inspire balanced, happy living.
View Bio

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

crossmenuarrow-leftarrow-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram