Vegan Gluten-Free Oat Breakfast Bars

Prep: 20 minCook: 15 min12 barsmediumAmerican
Gluten-Free Oat Breakfast Bars with Banana and Peanut Butter

These wholesome breakfast bars combine mashed banana, creamy peanut butter, and maple syrup with hearty gluten-free oats for a nutritious morning treat. Studded with sunflower seeds, dried fruit, and walnuts, they offer satisfying texture and natural sweetness. Perfect for busy mornings, lunchboxes, or post-workout fuel. The flax egg keeps them plant-based while adding omega-3s, and the bars hold together beautifully for grab-and-go convenience. Naturally sweetened and packed with fiber, they provide sustained energy without the crash of processed breakfast options.

Ingredients

Yield: 12 bars
  • ¼ cup + 2 tablespoons banana, mashed, very ripe (about 1 medium)
  • ¼ cup peanut butter, natural, unsalted, creamy
    almond butter1:1nut-freepeanuts-freeadds dairy

    works well

    Full guide →
  • 1 tablespoon maple syrup, pure
    honey1:1

    not vegan

    Full guide →
  • 1 tablespoon coconut oil, melted
  • 1 flax egg flax egg, 1 tablespoon golden ground flaxseed + 3 tablespoons water, whisked together, set for 15 minutes
  • 1 teaspoon vanilla extract, pure
  • 1 ½ cups oats, gluten-free rolled
  • ¼ teaspoon baking soda
  • ¼ teaspoon baking powder
  • teaspoon salt
  • ¼ cup sunflower or pumpkin seeds
  • ¼ cup raisins or dried cranberries, finely chopped if using cranberries
    mini chocolate chips1:1

    less healthy but kid-friendly

    Full guide →
  • ¼ cup walnuts, finely chopped
    pecans or almonds1:1

    different flavor profile

    Full guide →

Instructions

  1. 1

    Preheat oven to 350°F and line an 8-inch square baking pan with parchment paper or greased foil

  2. 2

    Mash banana until smooth in a large bowl using a fork or dough blender

  3. 3

    Add peanut butter, maple syrup, coconut oil, flax egg, and vanilla to the mashed banana and whisk until well incorporated

  4. 4

    Add oats, baking soda, baking powder, and salt, then fold with a rubber spatula until well mixed

  5. 5

    Fold in seeds, dried fruit, and walnuts

  6. 6

    Pour mixture into prepared pan and smooth into an even layer with rubber spatula

  7. 7

    Bake for 12-18 minutes until just lightly golden around the edges

  8. 8

    Cool for about 1 hour before slicing into bars

Tips

Tip 1

Use very ripe bananas with brown spots for maximum sweetness and easier mashing. Under-ripe bananas won't mash smoothly and provide less natural sugar.

Tip 2

Let the flax egg sit for the full 15 minutes to thicken properly - this acts as the binding agent that holds the bars together.

Tip 3

Don't overbake as the bars will continue cooking slightly while cooling. Look for light golden edges rather than browning throughout.

Good to Know

Storage

Store covered at room temperature for up to 3 days or refrigerate for up to 1 week. Wrap individually for grab-and-go convenience.

Make Ahead

Can be made up to 3 days ahead. Bars actually improve in texture after resting overnight as flavors meld.

Serve With

Serve at room temperature. Great with coffee, tea, or a glass of milk for a complete breakfast.

Common Mistakes

Watch

Don't skip cooling time or bars will crumble when cut

Watch

Ensure flax egg is fully set before using to prevent crumbly texture

Watch

Press mixture firmly into pan to avoid bars falling apart

Substitutions

Nut-Free Alternatives

peanut butter
almond butter1:1nut-freepeanuts-freeadds dairy

works well

Full guide →
peanut butter
sunflower seed butter1:1nut-freepeanuts-freeadds dairy

completely nut-free option

Full guide →

General Alternatives

maple syrup
honey1:1

not vegan

Full guide →
walnuts
pecans or almonds1:1

different flavor profile

Full guide →
raisins
mini chocolate chips1:1

less healthy but kid-friendly

Full guide →
Find more substitutions →

FAQ

Can I make these without the flax egg?

You can substitute with 1 regular egg, but this makes them non-vegan. The flax egg provides important binding properties.

How long do these bars keep?

They stay fresh for 3 days at room temperature or up to 1 week refrigerated. Wrap individually for best storage.

Can I freeze these breakfast bars?

Yes, wrap individually and freeze for up to 3 months. Thaw at room temperature for 30 minutes before eating.