Oatmeal Raisin Cookie Bars are my go-to when I want a cookie that’s a little more low-effort but still tastes like the real thing. They bake up soft and chewy, with golden edges and that cozy oatmeal cookie feel.

I really like this version because the brown sugar and cinnamon come through clearly, and the texture stays tender as long as you don’t push the bake time. The oats give it substance, the raisins add sweetness, and walnuts are a nice extra if you like a little crunch.

These bars are especially good for lunchboxes, casual get-togethers, and cookie trays when you don’t feel like scooping dough. I usually cut them into simple squares, and they hold up well for snacking.

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Why You’ll Love This Recipe

Soft and Chewy: The centers stay tender and cookie-like, with enough structure to slice cleanly once they cool.

One Pan: Everything goes into a 9 x 13-inch pan, which means no batches of cookies and no rotating trays.

Classic Flavor: Brown sugar, cinnamon, oats, and raisins just work. It tastes like a familiar oatmeal raisin cookie in bar form.

Easy to Slice: Cooling in the pan makes a big difference here, and the parchment overhang makes lifting and cutting simple.

Flexible Mix-Ins: Keep it traditional with raisins, or swap in dried cranberries or dates. Chocolate chips also work if you want them sweeter.

Ingredients You’ll Need

Unsalted butter: I like using softened butter (not melted) so the bars bake up chewy instead of greasy.

Light brown sugar: This is where a lot of the chew comes from. Dark brown sugar works too if that’s what you have.
Granulated sugar: Helps the edges set and gives a little crispness around the outside.
Eggs: Use large eggs, and make sure they’re mixed in well so the batter looks smooth.

Vanilla extract: Don’t skip it. It makes the oatmeal cookie flavor taste more like a cookie and less like plain oats.

All-purpose flour: I use regular flour here. Measure it the usual way (spoon and level) so the bars don’t turn dry.
Baking soda: Helps the bars rise a bit and keeps the texture tender.

Fine salt: Needed to keep the sweetness in check. If you only have kosher salt, use a little more.
Ground cinnamon: This is the main spice here, and I like a generous amount. If your cinnamon is old, it’s worth replacing.
Old fashioned rolled oats: Use old fashioned oats for the best texture. Quick oats can make the bars feel a little mushy.

Raisins: Regular raisins are great, but golden raisins work too. If yours are very dry, a quick soak in warm water helps.
Walnuts (optional): I like the crunch, but they’re totally optional. Pecans are also good if that’s what you keep around.

Recipe Instructions

Preheat the oven: Heat the oven to 350°F and line a 9 x 13-inch baking pan with parchment paper, leaving some overhang on the sides.

Cream the butter and sugar: Beat the softened butter with the brown sugar and granulated sugar until it looks lighter and fluffy.
Add the eggs and vanilla: Mix in the eggs, then the vanilla, and keep mixing until the batter looks smooth and well blended.
Mix the dry ingredients: In a separate bowl, whisk the flour, baking soda, salt, and cinnamon together.

Add the dry ingredients: Mix the dry ingredients into the wet ingredients just until you don’t see dry flour anymore.
Fold in the oats and raisins: Stir in the rolled oats and raisins (and walnuts if using) until everything is evenly mixed.
Press into the pan: Press the dough evenly into the prepared pan and smooth out the top so it bakes evenly.

Bake: Bake for about 22 to 28 minutes, until the edges are set and lightly browned and the center is just set.
Cool and slice: Cool completely in the pan for clean slices, then lift out using the parchment and cut into 16 bars.

Some of my tips!

This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.

Recipe Tips & Tricks

Use old fashioned oats. They give you that chewy, hearty texture that actually feels like an oatmeal cookie. Quick oats will work in a pinch, but the bars come out softer and less textured.

Don’t overmix once the flour goes in. Mix just until you stop seeing streaks of flour, then fold in the oats and raisins. Overmixing can make the bars bake up a little tougher.

Press the dough in evenly. I use lightly damp fingers or the bottom of a measuring cup to smooth it out. If it’s thicker in the middle, the center will need longer and the edges can dry out.

Pull them when the center is just set. The middle shouldn’t look wet, but it also shouldn’t look dry and firm. If you like softer bars, I’d rather underbake by a minute or two than go long.

Cool all the way before cutting. Warm bars are delicious, but they’ll crumble if you try to slice too soon. Cooling completely is what gives you clean squares.

Make some touches!

There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.

Serving Suggestions

Milk: A cold glass of milk is classic with oatmeal raisin bars. It’s especially nice if you bake them a touch under so the centers stay soft.
Coffee or tea: These are great with black coffee, a latte, or a strong cup of tea. Cinnamon and brown sugar just fit that kind of snack break.
Fruit: Fresh berries or sliced apples are nice on the side if you want something a little lighter with them. This is an easy way to make the plate feel less like “just dessert.”

Ice cream: If you want to serve them as a real dessert, try a bar with vanilla ice cream on the side. I like it best when the bar is slightly warmed.

Save it for later

This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.

Storage and Make Ahead

Store the bars airtight at room temperature for up to 4 days. I like to keep them in a container with a tight lid so they stay chewy and don’t dry out.

If you want to make this recipe ahead, bake the bars the day before and leave them whole in the pan until you’re ready to serve. Slice right before serving for the cleanest edges.

For longer storage, you can freeze the bars for up to 2 months. Wrap them individually or layer them with parchment so they don’t stick together.

To serve from frozen, thaw at room temperature for a bit, or warm one bar in the microwave for a few seconds if you want it softer.

A few quick answers

This section covers a few extra details that may help before you head to the recipe card.

Recipe FAQs

Can I use quick oats instead of old fashioned oats?

You can, but the texture changes. Quick oats make the bars softer and a little more uniform, while old fashioned oats give you that chewy, classic oatmeal cookie bite.

How do I know when the bars are done baking?

I look for set, lightly browned edges and a center that looks just set (not jiggly or wet). If you bake until the middle looks totally firm and dry, they’ll be thicker and more cake-like once cooled.

Can I swap the raisins for something else?

Yes. Dried cranberries and chopped dates both work well here. If your dried fruit is on the dry side, a quick soak in warm water (then drain well) helps it stay softer in the bars.

Do the walnuts have to be toasted first?

No, they don’t have to be. If I have time I’ll toast them, but even raw chopped walnuts bake up nicely in this recipe and add good crunch.

Can I add chocolate chips?

Yes, and it’s a nice change if you want a sweeter bar. Add about 1/2 cup chocolate chips and keep everything else the same.

Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.