Gluten Free Ginger Crunch
This easy gluten free ginger crunch is a true Kiwi classic. A crunchy golden base with a nice thick layer of spicy ginger icing. It’s hard to stop at just one piece!
I don’t know if it’s just because I’m a redhead and therefore have a natural affinity for ginger, but I am a huge fan of ginger crunch.
The crunchy base with a slab of thick icing on top, with a spicy ginger punch that cuts through the sweetness, it’s true perfection in my book.
It took a bit of work to get a gluten-free ginger crunch recipe that I was happy with. There were a few sad, crumbly attempts that tasted pretty great but were otherwise a mess. They didn’t go to waste – my dad is a huge fan too, so he made short work of the failures, but I really wanted to nail down a recipe that held together and was truly crunchy and not super crumbly.
So here we are with a ginger crunch recipe that ticks all the boxes!
Scroll down to the recipe card for the full ingredients list and printable recipe, or keep reading for ingredient tips and process photos.
Ingredient Notes:
- Gluten free flour – I used my homemade gluten free flour blend here, but I have also tested this recipe with Edmonds gluten free plain flour, and it works well with that, too.
- Xanthan gum – When using my gf flour blend, you’ll need to add some xanthan gum to the ginger crunch base. Xanthan gum helps to bind the ingredients together in place of gluten, and it’s an important factor in preventing a crumbly base. If you use Edmonds flour or another store-bought gluten free flour blend that already contains a gum ingredient (it will say in the ingredients on the packet), then you can omit the xanthan gum from the recipe.
- Baking powder – Make sure your baking powder is gluten free – Edmonds and Hansells are gluten free, but don’t use Pams, as it contains gluten.
- Ground ginger – Make sure your ground ginger isn’t past its best-before date, or you won’t get the full ginger flavour!
- Butter – You can use salted or unsalted butter, I use salted.
- Brown sugar and icing sugar – Brown sugar gives the base that lovely flavour and golden colour, and you’ll use the icing sugar for the icing.
- Golden syrup – You can use golden syrup from a tin or use the one in the squeeze bottle.
How to Make Gluten Free Ginger Crunch
First, you’ll prep the pan. I find it easiest to use two long strips of baking paper, the width of the tin, then overlap them in a cross shape and clip them in place. This way, it’s easy to lift the slice out once it’s set.
The clips are optional – you can spray the pan with baking spray to stick the baking paper down, but I’m lazy and hate washing a greasy tin, so I just clip it down. You do what works for you, though.
The recipe itself is every bit as easy to make as any classic ginger crunch. In this one, we’re melting the butter (I discovered that this is one of the keys to avoiding crumbles!), mixing in the brown sugar, and then sifting in the rest of the dry ingredients.
Spread it evenly into the tin. I like to use an offset spatula, but you could also use the back of a spoon.
Then it gets baked until it’s golden brown on the edges. Don’t under-bake this one – the more golden it is, the crunchier it will be.
When the base is almost finished baking, we mix up the icing. The butter, golden syrup and water get heated until the butter melts, then mixed with the sifted icing sugar and more ground ginger. I love this super spicy, but I’ve added notes in the recipe for toning down the ginger if you like it milder.
In my process pictures, I missed photographing an important step in this process. After taking the base out of the oven, it’s helpful to gently press it down with the back of a spoon or the bottom of a glass. This helps compact the crumb and make it crunchier + hold together better.
Then all that’s left to do is slather the icing onto the hot base once it comes out of the oven, then let it cool, slice it up, and eat it!
And pssst! If you love ginger, you’re definitely going to want to try my gluten free gingernut biscuits recipe next!
More Gluten Free Slice Recipes
Gluten Free Belgian Slice
Gluten Free Weetbix Slice
Gluten Free Rice Bubble Marshmallow Slice
Gluten Free Peppermint Slice
Are you new to gluten-free baking?
Or just need some tips on how to make the most of the recipes on GFKF? Check out my start guide to learn how to bake safely and successfully gluten free.
Allergen safety ✔️ Gluten free flour info ✔️
Accurate measuring ✔️ Tools + Equipment ✔️
Gluten Free Ginger Crunch
Ingredients
Base
- 200 g butter
- 225 g gluten free flour
- 80 g brown sugar
- 2 teaspoons ground ginger
- ¾ teaspoon baking powder
- ¾ teaspoon xanthan gum
Icing
- 60 g butter
- 3 Tablespoons water
- 3 Tablespoons golden syrup
- 450 g icing sugar
- 4 – 5 teaspoons ground ginger
- Optional: chopped glacé ginger, to decorate.
Instructions
- Heat the oven to 180°C (170° fan forced).Line a 20cm square cake pan or equivalent sized slice tin with baking paper. Use two long strips in a cross shape, leaving an overhang on each side, so you can lift the slice out later. I like to clip the ends down with binder clips so they don't flap around.
- In a medium-sized heatproof bowl microwave the butter in short bursts until just melted. Stir in the sugar, then sift in the gluten-free flour, ginger, baking powder and xanthan gum. Stir until well combined. The mixture should look like suuuuper soft cookie dough.
- Spread the mix evenly into the cake pan or slice tin. An offset spatula works well, otherwise, the back of a spoon will do the trick nicely too.
- Bake for 30 minutes, or until golden at the edges and no longer shiny in the middle.
- While the base bakes, prepare the ingredients for the icing.When the base is almost ready, place the butter, water and golden syrup into a medium-sized heatproof jug or bowl and microwave until the butter is just melted. Sift in the icing sugar and ground ginger, then mix until well combined. Give it a taste, if it's not ginger-y enough for you, add a bit more ground ginger.
- When the base comes out of the oven, carefully spoon over the icing, and spread it out evenly. Sprinkle with chopped glacé ginger, if desired.
- Leave to set completely, it’s best to do this at room temperature, but if you’re in a hurry, you can pop it in the fridge for a bit. Slice into squares using a large sharp knife.
- Store in an airtight container. Keeps for ages… if it doesn't get eaten first!
Tried these out on some other family members and they couldn’t taste the difference. Made a full batch of icing but thought there was too much so ended up only using half which gave me a good reason to make another ginger slice the following week to use up the remaining icing. Loved this one.
Was also good to find a recipe I could use my very lumpy, brown sugar that had gone hard!
just discovered your site after an inspiring trip to NZ where the gluten free baked goods are amazingly plentiful! I’m still shocked and delighted by that. I’m excited to try out the recipes on your site. Is the texture of the final product like a firm cookie bar with crunchy edges, or more like a shortbread? I got to try a couple slices in NZ but not this one. 😀
Hi Max, I’m so glad to hear you enjoyed your trip to NZ! So, the texture of a ginger crunch base is kind of hard to explain, it is probably closest to shortbread, but it’s maybe a bit more firm and crunchy than shortbread, which is lighter and crumblier, if that makes sense? And a richer flavour because of the brown sugar. The exact texture will depend on the type of gluten free flour you use, as well. When I use my own homemade blend the base is firmer and crunchier than when I use a store-bought gf flour blend, which is usually a bit more starchy, the texture is lighter and maybe a bit closer to shortbread.
I hope that helps, and I hope you enjoy the slice! 💜
Suggestion for you to give it crunch, add a handful of toasted buckwheat groats. Yum