Peanut Butter Flax Granola Squares

Featured in: Warm Bakes

These chewy squares combine creamy peanut butter, hearty oats, crunchy flaxseed, and sweet honey. Everything comes together for a satisfying, wholesome treat perfect any time of day. A simple preparation begins with blending dry elements together, melting the wet ingredients, and pressing the mixture into a pan for a quick bake. Customize with coconut or extra mix-ins like chocolate chips or dried fruit for added flavor. Enjoy as a portable snack or a nourishing breakfast option. Each batch bakes up golden, stores well, and offers vegetarian-friendly nutrition. Easily made vegan or gluten-free if needed.

Updated on Sat, 25 Oct 2025 14:31:40 GMT
Golden Peanut Butter Flax Granola Squares, fresh from the oven, promise a wholesome treat. Save
Golden Peanut Butter Flax Granola Squares, fresh from the oven, promise a wholesome treat. | butterhollow.com

These chewy Peanut Butter Flax Granola Squares are my answer to those busy mornings when breakfast needs to be quick but still nourishing. Packed with simple ingredients like rolled oats, peanut butter, and flaxseed, these bars come together in barely half an hour and make an easy portable snack or wholesome breakfast for the whole family.

I first started making these when my kids grew tired of store-bought granola bars. These homemade squares have become our go-to snack for hikes and lunchboxes honestly they disappear faster than I can bake them.

Ingredients

  • Old-fashioned rolled oats: provide chewy texture and lasting energy Look for oats that are labeled gluten free if needed
  • Ground flaxseed: is a sneaky hero here It adds nutty flavor and heart-healthy fats Use golden or brown flax both work well
  • Chopped roasted peanuts: deliver crunch and extra protein Choose unsalted for better control of flavor
  • Unsweetened shredded coconut: is optional but brings a faint tropical aroma I always go for the bigger flakes for more chew
  • Salt: is a crucial flavor booster Even a small pinch helps balance the sweet and nutty flavors
  • Creamy peanut butter: acts as a binder and gives big nutty flavor Natural peanut butter with just peanuts and salt works great
  • Honey or maple syrup: sweetens and also helps everything stick together Maple syrup is my favorite for a vegan option
  • Coconut oil or unsalted butter: ensures a soft texture If you want a richer taste use butter
  • Vanilla extract: rounds everything out and enhances the peanut butter aroma Look for pure vanilla for best results

Instructions

Preheat and Prepare Pan:
Line an eight inch square baking pan with parchment paper Leave enough hanging over the sides so you can easily lift the bars out after baking
Combine Dry Ingredients:
Place the rolled oats ground flaxseed chopped peanuts shredded coconut if using and salt in a large bowl Toss well to combine so there are no clumps of flax or coconut hiding in the corners
Melt Wet Ingredients:
In a small saucepan over low heat stir together the peanut butter honey and coconut oil Keep stirring gently until everything is smooth and melted together This takes about three minutes Remove from the heat and stir in the vanilla extract
Mix Wet with Dry:
Pour the warm peanut butter mixture over the oat mixture Use a sturdy spatula or your hands if cool enough and mix very thoroughly Every oat and seed should be slick and sticky
Transfer and Press into Pan:
Spoon the mixture into your prepared pan Using a spatula or damp hands press it down very firmly and evenly Go right into the corners so your squares hold together well
Bake to Perfection:
Slide the pan into the oven and bake for eighteen to twenty minutes Watch for the edges turning lightly golden and smelling toasty That is your sign to take them out
Cool and Slice:
Set the pan on a wire rack and let the bars cool completely This helps them firm up Only then use the parchment overhang to lift out and slice into sixteen squares
Close-up shows delicious Peanut Butter Flax Granola Squares loaded with oats and drizzled honey. Save
Close-up shows delicious Peanut Butter Flax Granola Squares loaded with oats and drizzled honey. | butterhollow.com

Every time I pull a batch from the oven the smell of peanut butter takes me back to making snacks with my grandmother She used to let us pour in extra peanuts for crunch and those are still my favorite bites

Storage Tips

Let the granola squares cool fully before transferring to a storage container If left warm they tend to sweat and soften I like to keep mine in an airtight tin at room temperature where they stay delicious for up to five days If you want longer storage these bars also freeze beautifully just layer them between parchment and thaw at room temperature

Ingredient Substitutions

Almond or sunflower seed butter make great swaps if you cannot use peanut butter Rolled oats can be replaced with quick oats for a slightly different texture Dried fruit like cranberries or raisins can take the place of coconut for those who prefer a more classic granola bar

Serving Suggestions

These bars are perfect with a cup of tea as a late morning snack For a breakfast boost spread a little extra peanut butter on top or crumble a square over plain yogurt For kids try mixing in mini chocolate chips or drizzling with a little melted chocolate after baking

Homemade Peanut Butter Flax Granola Squares taste amazing as an easy breakfast snack. Save
Homemade Peanut Butter Flax Granola Squares taste amazing as an easy breakfast snack. | butterhollow.com

Every time you make these bars you will enjoy a flavor and nostalgia that keeps breakfast or snack time special

Kitchen Tips & Answers

Can I substitute almond butter for peanut butter?

Yes, almond butter or other nut butters can replace peanut butter for a different flavor.

Are these squares gluten-free?

If using certified gluten-free oats, the squares will be suitable for gluten-sensitive diets.

How should I store them?

Store in an airtight container at room temperature; they'll keep fresh for up to five days.

Can I add chocolate chips or dried fruit?

Absolutely! Stir in mini chocolate chips or dried fruit before baking for extra taste and texture.

What can I use instead of coconut oil?

Unsalted butter or another mild oil works well if coconut oil isn't preferred.

Are these squares suitable for breakfast?

They're packed with oats and nuts, making them a convenient and nourishing option for busy mornings.

Peanut Butter Flax Granola Squares

Chewy squares blend peanut butter, oats, flaxseed, and honey. Ideal as a hearty snack or grab-and-go breakfast.

Prep duration
15 min
Heat duration
20 min
Complete duration
35 min
Created by Ella Thompson

Type Warm Bakes

Skill level Easy

Heritage American

Output 16 Portions

Eating preferences Meat-free

What you'll need

Dry Ingredients

01 2 cups old-fashioned rolled oats
02 1/2 cup ground flaxseed
03 1/4 cup chopped roasted peanuts
04 1/4 cup unsweetened shredded coconut (optional)
05 1/4 teaspoon salt

Wet Ingredients

01 1/2 cup creamy peanut butter
02 1/3 cup honey or maple syrup
03 2 tablespoons coconut oil or unsalted butter
04 1 teaspoon vanilla extract

Method

Phase 01

Prepare Baking Pan: Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy lifting.

Phase 02

Mix Dry Ingredients: In a large mixing bowl, combine the rolled oats, ground flaxseed, chopped roasted peanuts, shredded coconut if using, and salt until evenly distributed.

Phase 03

Melt Wet Ingredients: In a small saucepan over low heat, stir together the peanut butter, honey or maple syrup, and coconut oil or unsalted butter until fully melted and smooth. Remove from heat and stir in vanilla extract.

Phase 04

Combine Mixtures: Pour the melted wet mixture over the dry ingredients and mix thoroughly until everything is evenly coated.

Phase 05

Form and Compress: Transfer mixture to the prepared baking pan. Use a spatula or clean hands to press mixture firmly and evenly into the pan.

Phase 06

Bake: Bake for 18 to 20 minutes until edges turn lightly golden.

Phase 07

Cool and Portion: Allow to cool completely in the pan on a wire rack. Once cooled, lift out using the parchment paper and cut into 16 squares.

Kitchen tools needed

  • 8x8-inch baking pan
  • Large mixing bowl
  • Small saucepan
  • Spatula
  • Parchment paper

Allergy details

Always review individual ingredients for potential allergens and seek professional medical guidance if uncertain.
  • Contains peanuts; may contain tree nuts if alternative nut butters or add-ins are used.
  • Contains gluten unless certified gluten-free oats are chosen.
  • Check all ingredient labels if managing allergies.

Nutrient breakdown per portion

Numbers shown are estimates only - consult healthcare providers for specific advice.
  • Energy: 145
  • Fats: 8 g
  • Carbohydrates: 15 g
  • Proteins: 4 g