Plum flapjacks recipe

(103 ratings)

Plum flapjacks make a wonderful dessert in late summer or early autumn. The flavours will impress all your friends and family.

Plum flapjacks cut into squares and placed on a piece of brown baking paper
(Image credit: Getty)
Preparation Time15 mins
Cooking Time45 mins
Total Time1 hours
Cost RangeCheap
Nutrition Per PortionRDA
Calories289 Kcal14%
Sugars18.8 g21%
Saturated Fat8.2 g41%
Protein2.9 g6%
Fat15.6 g22%
Carbohydrates33.1 g13%

These lightly spiced plum flapjacks are sweet, and sticky and each portion is under 300 calories. 

If you love our flapjack recipe we’re sure you will enjoy making these plum flapjacks. To keep the recipe gluten-free make sure you use a suitable plain flour. These tasty treats are the perfect weekend baking project – and children will love helping to make them too. 


  • 200g plums, halved, stoned and sliced
  • A pinch of mixed spice
  • 150g light Muscovado sugar
  • 150g oats
  • 70g plain flour
  • 30g walnuts, roughly chopped
  • 150g butter, melted
  • 2tbsp golden syrup




  1. Heat the oven to 200C (180C fan, Gas 6). Grease and line a square baking tin.
  2. Toss the plums with the mixed spice and 25g of the sugar in a bowl, cover and leave to macerate.
  3. In a large bowl, mix together the oats, flour, walnuts, and the remaining sugar.
  4. Stir in the melted butter and golden syrup and combine.
  5. Grease a square baking tin and pour in half of the flapjack mix. Scatter over the plums and then top with the remaining flapjack mix.
  6. Bake for 45 minutes, until starting to crisp at the edges. Leave to cool completely before removing from the tin and cutting into 10 portions.

Top tips for making plum flapjacks

If you don’t have mixed spice in your spice rack we have some easy substitutions. We also have guidance on the best time of year to bake these plum flapjacks as well as some additional flavour pairings. 

What can I use instead of mixed spice?

Swap mixed spice for a pinch of cinnamon or ground ginger. You could use a combination of the two if you like. Mixed spice is a blend of spices commonly made from ground cinnamon, nutmeg, ginger, clove and more. Some brands also include hints of ground orange peel, coriander seed, dill and caraway. 

What is the best season for plums?

In the UK plums are harvested from August to October. They will be the sweetest and most flavoursome during these months so it’s best to bake these flapjacks then. The best plums will have a slightly soft feel when gently squeezed. If the plums are a little over ripe it is fine for this recipe as they will macerate and break down quicker. 

What spices go well with plums?

Warm spices like ginger, cinnamon and clove are a wonderful pairing for plums. Citrus such as orange and lemon also go nicely. You could add some zest to this flapjack batter for a flavour boost that adds relatively few calories. 

It’s best to store these plum flapjacks in an airtight container or cake tin once baked. It will keep them from drying out and looks nice on your kitchen counter too. If you need to replace some old tins, consider upgrading to this set from Mason Cash. 

Mason Cash Forest Set of 3 Cake Tins - View at Amazon 

Mason Cash Forest Set of 3 Cake Tins - View at Amazon 

This chic trio of cake tins will look lovely in your home. If you’re taking the plum flapjacks or another bake to a friend or family member’s house these are the perfect container to showcase your finished bake. The three sizes neatly stack inside one another when not being used and come in an attractive selection of colours. We like the subtle forest pattern on the outside of the tin too. 

The recipes for our apple flapjacks and blueberry flapjacks are similar to this one because they use fresh berries. For another fruity option, consider baking our banana flapjacks which are an affordable option and only 160 calories per portion. 

Jessica Ransom
Senior Food Writer

Jessica is a freelance food writer, stylist and recipe tester. She previously worked as Senior Food Writer at Future. While at Future Jessica wrote food and drink-related news stories and features, curated product pages, reviewed equipment, and developed recipes that she then styled on food shoots. She is an enthusiastic, self-taught cook who adores eating out and sharing great food and drink with friends and family. She has completed the Level 1 Associate course at the Academy of Cheese and is continually building on her knowledge of beers, wines, and spirits.