Peanut Butter Blossom Bars are my go-to when I want the flavor of a classic peanut butter blossom cookie, but in an easy bar form. They’re soft and chewy with that familiar peanut butter taste, plus the little pop of milk chocolate on top.
I like this version because the base bakes up thick and tender, not dry or crumbly. The bars slice cleanly, the kisses stay put, and the whole thing has that old-school holiday cookie tray feel without having to roll and shape individual cookies.
These are especially good for cookie swaps, bake sales, and December baking, but I make them year-round when I want a straightforward peanut butter-and-chocolate dessert. For me, they’re best once they’ve cooled and set, with a cold glass of milk or coffee.
Why You’ll Love This Recipe
Soft and Chewy: The centers stay tender and chewy, with just-set edges so you still get that cookie-bar texture.
Classic Blossom Flavor: Peanut butter plus chocolate kisses is a combo that never really gets old, especially on holiday platters.
Sheet Pan Simple: You get the look of peanut butter blossoms without shaping a batch of individual cookies.
Easy to Slice and Share: These cut into tidy squares, which makes them great for parties, cookie trays, and lunchbox treats.
Flexible Toppings: If you don’t have kisses, you can swap in chocolate stars or mini peanut butter cups and the bars still work.
Ingredients You’ll Need
Peanut Butter Bar Base
- All-purpose flour: I use regular flour here. It gives the bars structure so they slice cleanly and don’t fall apart.
- Baking soda: Don’t skip it. It helps the bars rise a bit and keeps them from baking up dense.
- Salt: This keeps the sweetness in check and makes the peanut butter taste more like itself.
- Unsalted butter: Softened butter creams better with the sugars. If your butter is still cold, the batter won’t get as light.
- Creamy peanut butter: Creamy is the easiest and most consistent here. Natural peanut butter can work, but it can make the texture a little more unpredictable.
- Granulated sugar: This gives the bars that classic cookie sweetness and helps the top get a little bit of a crust.
- Light brown sugar: Brown sugar is where a lot of the chew comes from. Dark brown sugar works too if that’s what you have.
- Eggs: Use large eggs, and bring them closer to room temp if you can. They mix in more smoothly.
- Vanilla extract: I use real vanilla, but the basic stuff is totally fine in a cookie bar like this.
- Milk: A small splash keeps the batter easier to spread in the pan and helps the bars stay soft.
Topping
- Milk chocolate kisses: Unwrap them before you start baking so you can press them in right away. Milk chocolate is the classic “blossom” flavor, but any kiss variety works.
- Granulated sugar: This is optional, but I like a light sprinkle on top. It gives a little sparkle and a tiny bit of crunch.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F and line a 9 x 13-inch baking pan with parchment paper, or grease it really well.
- Mix the dry ingredients: Whisk the flour, baking soda, and salt together in a medium bowl, then set aside.
- Beat the butter and peanut butter: In a large bowl, beat the softened butter and creamy peanut butter until smooth and well mixed.
- Add the sugars: Beat in the granulated sugar and brown sugar until the mixture looks lighter and fluffy.
- Add the eggs and vanilla: Beat in the eggs, then mix in the vanilla extract until combined.
- Add the dry ingredients and milk: Mix in the flour mixture in additions, alternating with the milk, just until you no longer see dry flour.
- Spread the batter: Spread the batter evenly in the pan. If you want, sprinkle a light coating of granulated sugar over the top.
- Bake: Bake for 18 to 22 minutes, until the edges are set and the center is just set.
- Add the kisses: Right away, press the chocolate kisses evenly over the top, without pushing them all the way down to the bottom.
- Cool and slice: Let the bars cool in the pan for 30 to 60 minutes, then lift out using the parchment and slice into 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 parchment paper. It’s the easiest way to lift the whole slab out and get clean slices. Greasing works, but parchment is less hassle.
Don’t overmix once the flour goes in. Mix just until the flour disappears. Overmixing can make the bars a little tougher than they need to be.
Pull them when the center is just set. The edges should look done, but the middle shouldn’t be dry. They keep baking a little as they cool.
Press the kisses in right away. The bars need to be hot so the kisses stick. If you wait too long, they’ll sit on top and pop off when you slice.
Use a 9 x 9-inch pan for thicker bars. They’ll be taller and a bit more like a cookie-cake bar. Bake closer to 25 to 30 minutes and watch the center.
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 peanut butter chocolate bars. I like this best when the bars are completely cooled and the kisses are set.
- Coffee or espresso: These are great with coffee, especially if you like sweet-and-salty desserts. A latte or plain black coffee both work.
- Ice cream: Serve a bar with vanilla ice cream on the side if you want a more “dessert plate” feel. It’s also good with chocolate or peanut butter swirl.
- Fruit: Strawberries or raspberries are nice next to something this rich. I usually just do a small bowl on the side.
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 5 days. I keep them in a container with a tight lid so the peanut butter base stays soft.
You can make these ahead for a party or cookie tray. Bake, cool, slice, then layer the bars with parchment or wax paper so the kisses don’t smudge.
If you want them to last longer, freeze the bars for up to 2 months. I like freezing them already sliced so you can grab a few at a time.
Thaw at room temperature for an hour or two, or overnight in the fridge. The kisses can look a little dull after freezing, but the flavor is still good.
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 crunchy peanut butter?
You can. The bars will have little peanut bits throughout and the batter can be slightly thicker. I usually stick with creamy for the most even texture, but crunchy works if that’s what you have.
How do I know when the bars are done baking?
Look for edges that are set and lightly golden, with a center that looks just set (not wet, but not dried out). If you wait until the center looks completely firm, the bars can end up more cakey and less chewy.
Can I swap the Hershey kisses for something else?
Yes. Chocolate stars are a fun swap, and mini peanut butter cups work too. If your topping is larger or heavier, press it in gently so it sticks without sinking.
Can I bake these in a 9 x 9-inch pan?
Yes, you’ll get thicker peanut butter blossom bars. Plan on baking about 25 to 30 minutes, and start checking early if your oven runs hot.
Why did my kisses melt or smear?
Warm bars will soften the kisses fast, and that’s normal. Let the bars cool before slicing, and use a sharp knife wiped clean between cuts if you want the neatest edges.
You might also like
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.
MORE DINNER RECIPES TO TRY
Peanut Butter Blossom Bars
INGREDIENTS
Peanut Butter Bar Base
- 2.5 cups all purpose flour
- 1 tsp baking soda
- ½ tsp salt
- 1 cup unsalted butter softened
- 1 cup creamy peanut butter
- 1 cup granulated sugar
- 1 cup light brown sugar packed
- 2 large eggs
- 2 tsp vanilla extract
- ¼ cup milk.
Topping
- 24 to 30 milk chocolate kisses unwrapped
- 2 tbsp granulated sugar for sprinkling optional.
INSTRUCTIONS
Peanut Butter Bar Base
- Preheat oven to 350 degrees F and line a 9 x 13 inch baking pan with parchment paper or grease well
- whisk flour baking soda and salt
- beat butter peanut butter granulated sugar and brown sugar until light and fluffy
- beat in eggs and vanilla
- mix in dry ingredients alternating with milk just until combined
- spread batter evenly in pan and optionally sprinkle with a light coating of sugar.
Bake And Finish
- Bake until edges are set and the center is just set 18 to 22 minutes
- immediately press chocolate kisses evenly over the surface without pushing to the bottom
- cool in pan 30 to 60 minutes then lift out and slice into bars.
