Mom’s Nanaimo Bars (a Canadian recipe from my BC kitchen)

I grew up eating Nanaimo bars at every family gathering, school potluck, and holiday party you can imagine. Growing up in BC and living just a short ferry ride from Nanaimo itself, these bars have been part of my life for as long as I can remember. This recipe comes from my mom, and after years of eating versions from bakeries, coffee shops, and other people’s kitchens, I genuinely think hers is the best. The layers are properly balanced, the custard is silky and rich, and the whole thing is a little less sweet than most versions, which is what makes it so good.

Why this recipe is less sweet than most

Most Nanaimo bar recipes have a thin custard layer that leans heavily on powdered sugar for its flavor. My mom’s version uses more butter and more Bird’s Custard Powder, which makes the filling noticeably thicker and richer, and the extra custard powder is what keeps it from tasting cloyingly sweet. The result is a middle layer that actually tastes like custard rather than just icing, and that difference is what makes the whole bar feel balanced rather than one-note. It’s the kind of thing you notice immediately if you’ve eaten a lot of Nanaimo bars, which, living where I do, I absolutely have.

The case for Bird’s Custard Powder

If you’ve never baked with Bird’s Custard Powder, this is a good reason to start. It’s a staple in Canadian and British kitchens, and it’s what gives the middle layer of a Nanaimo bar its distinctive flavor: vanilla-forward, slightly eggy, and unmistakably different from what you’d get with just powdered sugar and butter. You can find it at most Canadian grocery stores, at specialty food shops, or online. There isn’t a perfect substitute, though some people use instant vanilla pudding mix in a pinch. It works, but the flavor is milder and the texture slightly different. For the real thing, Bird’s is worth tracking down.

The origin story (and why it’s still debated)

Nanaimo bars are named after the city of Nanaimo on Vancouver Island. The story I grew up hearing is that recipe came from a 1952 community cookbook under the name “chocolate square,” but the exact origin is contested. The city took the naming seriously enough that in 1986, Nanaimo’s mayor ran an official contest to find the definitive recipe. The winner is now the city’s “official” version, posted on the Nanaimo city website.

I’ve eaten Nanaimo bars from shops in the city itself, and from experience, the bakery versions vary enormously. Some have too-thick chocolate tops that crack when you bite in. Some have custard layers that taste more like frosting than anything else. My mom’s version, which I grew up eating, has always felt the most balanced to me.

Store and freeze

How do I store Nanaimo bars? Store in a covered container on your counter for several days, or in your fridge for up to a week.

Can you freeze Nanaimo bars? You sure can! Store in the freezer in a freeer-proof container for up to three months. If you need to stack them, put pieces of parchment paper between the layers. To thaw, put them in the fridge overnight. Or let one sit on your counter for about 10 minutes – they don’t take long to thaw!

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Mom’s Nanaimo Bars (a Canadian recipe from my BC kitchen)

Prep: 40 minutes mins

Chill Time: 1 hour hr

Cook: 0 minutes mins

Total: 1 hour hr 40 minutes mins

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This is my mom's Nanaimo bar recipe, passed down from years of making them in a BC kitchen not far from where these bars were invented. The graham cracker, coconut, and walnut base is chewy and deeply chocolatey, the Bird's Custard Powder filling is buttery and just sweet enough, and the dark chocolate top pulls it all together. Less sweet than the bakery versions you'll find around Vancouver Island, and better for it.

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Ingredients

Bottom Layer

• ▢ ½ cup butter
• ▢ 5 tablespoons cocoa powder
• ▢ ¼ cup granulated sugar
• ▢ 1 large egg
• ▢ 1 ¾ cup Graham cracker crumbs
• ▢ ¾ cup fine coconut
• ▢ ¼ cup chopped walnuts

Middle Layer

• ▢ 3 cups powdered sugar
• ▢ ¾ cup butter (softened)
• ▢ ¼ cup milk
• ▢ ¼ cup Bird's vanilla custard powder

Top Layer

• ▢ 8 ounces shaved dark chocolate or chocolate chips
• ▢ 4 tablespoons butter

Instructions 

Bottom layer

• Lay a piece of parchment paper in a 9×11-inch pan, letting some hang over the sides. (This makes it easier to remove the Nanaimo bars.) Melt the butter in a medium-sized pot over medium heat. Whisk in the cocoa powder and sugar. Remove the pot from the heat then add the egg and whisk until it has thickened, about 30 seconds.
  
• Stir in the Graham cracker crumbs, coconut, and walnuts. Press the crust firmly into the prepared pan.
  ½ cup butter, 5 tablespoons cocoa powder, ¼ cup granulated sugar, 1 large egg, 1 ¾ cup Graham cracker crumbs, ¾ cup fine coconut, ¼ cup chopped walnuts
  

Middle layer

• Add all the middle layer ingredients to a large bowl and cream them together using electric beaters. Pour the custard over the first layer and smooth the top.
  3 cups powdered sugar, ¾ cup butter, ¼ cup milk, ¼ cup Bird's vanilla custard powder
  
• Place the pan into your fridge for at least 20 minutes, or until the custard is firm.
  

Top layer

• Add the chocolate and butter to a medium-sized pan over low heat and let both melt. Whisk to combine and then pour the chocolate over the custard. Smooth the top first with a spatula then by gently tapping the pan on your counter.
  8 ounces shaved dark chocolate or chocolate chips, 4 tablespoons butter
  
• Chill in your fridge for about 20 minutes, or until the chocolate is soft-set. Cut the Nanaimo bars into bars then place them back in your fridge until they are completely set. (Cutting the bars first prevents the chocolate from cracking.)
  
• Store the bars in a covered container in your fridge for a week or up to three months in your freezer. The bars can be eaten cold or at room temperature – they take about 10 minutes to warm once out of the fridge.
  

Video

Nutrition

Serving: 1 bar, Calories: 150kcal (8%), Carbohydrates: 16g (5%), Protein: 1g (2%), Fat: 10g (15%), Saturated Fat: 6g (38%), Polyunsaturated Fat: 1g, Monounsaturated Fat: 2g, Trans Fat: 1g, Cholesterol: 24mg (8%), Sodium: 91mg (4%), Potassium: 33mg (1%), Fiber: 1g (4%), Sugar: 13g (14%), Vitamin A: 219IU (4%), Vitamin C: 1mg (1%), Calcium: 10mg (1%), Iron: 1mg (6%)

© Author Kristen Stevens

We have thoroughly tested this recipe for accuracy. However, individual results may vary. See our full recipe disclosure here.

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