No-Bake Brownie Fifteens: Chocolate Marshmallow Bars

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This morning I discovered a small hole in my favourite Burton socks and, for a moment, I was a little sad. They’ve been my go-to pair, cozy and dependable. I resisted taking a photo—foot pictures just felt a bit awkward—so I moved on and focused on what mattered next: food.

On with the eats…

The no-bake Vanilla Fifteens I tried recently were a hit. After that success I kept craving chocolate, and when I attempted a peanut butter version it didn’t satisfy that intense chocolate urge. So I made a chocolate variation that includes an unexpected twist: spirulina. It’s still a Fifteens-style treat, but with an earthy, nutrient-dense boost.

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About Spirulina

I first turned to spirulina when I was vegan and working through some protein gaps. It taught me an important lesson about intentional eating: whether vegan or omnivorous, paying attention to the nutrients you consume matters. Spirulina became a convenient way to add concentrated nutrition to snacks and smoothies.

Spirulina is a blue-green algae often praised for its rich nutrient profile. It provides a variety of vitamins, minerals and phytonutrients that can complement a balanced diet. Below are key qualities that are commonly highlighted about spirulina:

  • Very high in protein by dry weight, making it a dense source of amino acids.
  • Contains all eight essential amino acids, offering a complete protein profile.
  • Rich in several B vitamins and beta-carotene (a form of vitamin A).
  • Contains chlorophyll, trace minerals, and enzymes that support cellular function and energy.
  • Provides gamma-linolenic acid (GLA), an omega fatty acid associated with nervous system health.
  • Includes phycocyanin, a pigment noted for antioxidant and anti-inflammatory activity.
  • Can be a source of vitamin B12 analogs and bioavailable iron for some people.
  • May support immune function through various nutrient contributions.

Keep in mind that spirulina is a supplement and not a replacement for a varied diet. It’s also heat-stable, so it can be incorporated into cooked foods and baked treats without losing much of its character. I enjoy cooking with it and experimenting with small amounts in desserts when I want an extra nutrient boost.

Back to the Fifteens: these little no-bake bites are quick to assemble, satisfying, and portable. They’re perfect as an afternoon pick-me-up or a small dessert when you want something chocolatey but still nourishing. I pop mine in the freezer for a few minutes to firm them up—slightly frozen is my favourite texture.

Happy Saturday—enjoy a batch of Fifteens with or without spirulina, and feel free to experiment with flavours that satisfy your cravings while supporting your nutrition goals.

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No-Bake Brownie Fifteens
Cuisine: Vegan, Gluten free, Dairy free
Author: Leanne Vogel
Prep time:
Cook time:
Total time:
Serves: 8 Fifteens
A compact, nutrient-dense snack: these No-Bake Brownie Fifteens combine dates, walnuts, cacao and a touch of spirulina for a quick sweet bite that also supports overall nutrition.
Ingredients
  • 12 Medjool dates, pitted
  • 1/2 cup walnuts + 1/2 cup crushed walnuts for topping
  • 2 teaspoons spirulina
  • 3 tablespoons cacao powder
  • 2 tablespoons cacao nibs
Instructions
  1. Combine the dates, walnuts, spirulina, cacao powder and cacao nibs in a food processor.
  2. Pulse until the mixture breaks down and the walnuts are small—about the size of a pen cap. The mixture should hold together when pressed.
  3. Roll the mixture into small balls and place them on a clean surface or a tray.
  4. One at a time, press each ball into the crushed walnuts so they stick, rolling between your palms until well coated.
  5. Place the finished Fifteens in the freezer for 4–5 minutes to firm up; they are especially enjoyable slightly chilled.

What superfoods do you rely on, or which would you like to try?

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