These gluten free protein rhubarb bars are a perfect blend of tart rhubarb and a subtly sweet, protein-packed base. Ideal for a nutritious snack or breakfast on the go, they combine wholesome ingredients that fuel your day while satisfying your craving for something fruity and fresh. Their naturally tangy flavor balances beautifully with a hint of vanilla and cinnamon, making these bars both delicious and healthful.
Ingredients
- 1 1/2 cups fresh rhubarb, chopped into 1/2-inch pieces
- 2 tablespoons maple syrup (or honey for non-vegan option)
- 1 teaspoon vanilla extract
- 1 cup gluten free rolled oats
- 3/4 cup almond flour
- 1/2 cup vanilla or unflavored protein powder (pea, whey, or your choice)
- 1/4 cup coconut sugar or brown sugar
- 1 teaspoon baking powder (gluten free)
- 1/2 teaspoon ground cinnamon
- 1/4 teaspoon salt
- 1/2 cup unsweetened almond milk (or any plant milk)
- 1/4 cup coconut oil, melted
- 1 large egg (or flax egg for vegan: 1 tbsp flaxseed meal + 3 tbsp water)
Instructions
- Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving an overhang for easy removal.
- In a small bowl, toss the chopped rhubarb with 1 tablespoon of maple syrup and 1/2 teaspoon vanilla extract. Set aside to macerate while you prepare the base.
- In a large mixing bowl, combine the gluten free rolled oats, almond flour, protein powder, coconut sugar, baking powder, cinnamon, and salt. Stir well to evenly distribute the dry ingredients.
- In a separate bowl, whisk together the almond milk, melted coconut oil, remaining 1 tablespoon maple syrup, vanilla extract, and egg (or flax egg). Make sure the flax egg has thickened if using.
- Pour the wet ingredients into the dry ingredients and mix until just combined. The batter will be slightly thick but moist.
- Fold the macerated rhubarb gently into the batter, reserving any excess liquid.
- Transfer the batter into the prepared baking pan and smooth the top evenly with a spatula.
- Bake in the preheated oven for 30-35 minutes, or until the edges are golden and a toothpick inserted near the center comes out mostly clean with a few moist crumbs.
- Remove from oven and let cool completely in the pan on a wire rack. Once cool, use the parchment overhang to lift the bars out and cut into 9 equal squares.
- Enjoy immediately or store as directed below.
Tips
- Protein powder choice: Use a mild flavored protein powder like vanilla pea or whey to complement the rhubarb without overpowering it. Avoid heavily flavored or chocolate powders.
- Rhubarb preparation: If your rhubarb is very tart, you can increase the maple syrup slightly during maceration to balance acidity.
- Substitutions: Swap almond flour for oat flour or gluten free all-purpose flour if preferred, but expect a slightly different texture.
- Common mistake: Don’t overmix the batter once wet and dry ingredients are combined to keep the bars tender rather than dense.
Serving Suggestions
These bars are delicious on their own as a quick snack or breakfast. For an extra boost, serve with a dollop of Greek yogurt or a smear of nut butter. They also pair well with a hot cup of herbal tea or coffee. You can slice them thinner for bite-sized treats or thicker for more substantial portions.
Variations
To change things up, try adding a handful of chopped nuts like walnuts or pecans into the batter for extra crunch. Stir in a teaspoon of lemon zest to brighten the rhubarb’s tartness. For a dairy-free version, substitute the egg with a flax or chia egg and ensure your protein powder is plant-based. If you prefer a sweeter bar, drizzle a little extra maple syrup on top before baking.
Storage and Reheating
Store the bars in an airtight container at room temperature for up to 2 days. For longer storage, keep them refrigerated for up to 5 days or freeze for up to 3 months. To freeze, wrap bars individually in plastic wrap and place in a freezer bag. Thaw overnight in the fridge or warm gently in a microwave at 50% power for 20-30 seconds. Avoid overheating to preserve texture and flavor.
Frequently Asked Questions
Can I use frozen rhubarb instead of fresh?
Yes, frozen rhubarb works well. Thaw and drain any excess liquid before macerating with the maple syrup to prevent the batter from becoming too wet.
Is this recipe suitable for vegans?
It can be made vegan by replacing the egg with a flax or chia egg and ensuring the protein powder is plant-based. Also, use maple syrup instead of honey if you want to avoid animal products.
What protein powder works best in baking?
Vanilla-flavored whey or pea protein powders are excellent choices because they have mild flavors and good texture. Avoid plant powders with strong grassy or bitter notes unless you enjoy those flavors.
Can I make these bars nut-free?
Yes, substitute almond flour with a gluten free all-purpose flour blend and use a seed-based milk like oat or rice milk. Ensure your protein powder is also nut-free.
How do I know when the bars are done baking?
Look for golden edges and a toothpick inserted in the center coming out mostly clean with just a few moist crumbs. Overbaking can dry them out, so start checking around 30 minutes.
Can I add other fruits to this recipe?
Definitely. Blueberries, chopped strawberries, or diced apples can be folded into the batter along with or instead of rhubarb. Adjust the sweetener slightly depending on the fruit’s natural sweetness.
With this recipe, you get a nutritious, gluten free snack that balances protein and fresh fruit flavors perfectly. Whether for meal prep or a quick treat, these rhubarb bars offer a wholesome option that’s easy to make and enjoy any time.
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