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Layered Peanut Butter Bars (Cookie Mix)

The scent of peanut butter always throws me back to childhood afternoons spent in my grandmother’s sunny kitchen. She had this well-worn, slightly battered tin filled with peanut butter blossoms, and sneaking one was a daily ritual. These Layered Peanut Butter Bars, while not blossoms, evoke that same sense of comforting indulgence, that perfect balance of sweet and salty, rich peanut butter, and smooth chocolate that makes you feel like everything is right in the world. They’re simple enough for a weeknight treat, yet impressive enough to bring to a party – a little square of pure, unadulterated joy.

Recipe Overview

Prep Time: 20 minutes
Cook Time: 18 minutes
Total Time: 1 hour 50 minutes (includes cooling and refrigeration)
Servings: 36
Yield: 36 bars
Dietary Type: Vegetarian

Ingredients

Cookie Base:

17 ½ ounces Betty Crocker Peanut Butter Cookie Mix
3 tablespoons vegetable oil
1 tablespoon water
1 egg

Filling:

½ cup (1 stick) butter, softened
½ cup creamy peanut butter
2 cups powdered sugar
2 teaspoons milk

Frosting:

1 cup semi-sweet chocolate chips
¼ cup (½ stick) butter

Equipment Needed

13×9-inch baking pan
Cooking spray
Large bowl
Electric mixer
Microwave-safe bowl

Instructions

Preheat your oven to 350°F (175°C). This temperature is crucial for even baking of the cookie base.
Lightly spray the bottom of your 13×9-inch pan with cooking spray. This prevents the cookie base from sticking and makes for easy removal later. Don’t skip this step!
In a large bowl, combine all the Cookie Base ingredients: the Betty Crocker Peanut Butter Cookie Mix, vegetable oil, water, and egg. Stir vigorously until a soft dough forms. The dough will be slightly sticky, but that’s perfectly normal.
Press the dough evenly into the bottom of the prepared pan. I find that using floured fingers helps prevent the dough from sticking to your hands. A silicone spatula can also be useful for smoothing it out. Make sure the dough is consistently thick across the entire pan.
Bake the cookie base for 15 to 18 minutes, or until it’s golden brown. Keep a close eye on it during the last few minutes of baking to prevent burning. The edges should be slightly darker than the center. A toothpick inserted into the center should come out with just a few moist crumbs.
Remove the pan from the oven and let the cookie base cool completely, for about 1 hour. This is important because spreading the filling on a warm base will cause it to melt. Patience is key!
While the cookie base is cooling, prepare the Filling. In a small bowl, beat together the softened butter, creamy peanut butter, powdered sugar, and milk with an electric mixer on medium speed until smooth and creamy. Make sure your butter is truly softened to avoid lumps in the filling. If the filling seems too dry, add an extra teaspoon of milk at a time until you reach the desired consistency.
Once the cookie base is completely cool, spread the peanut butter filling evenly over it. Use an offset spatula or the back of a spoon to create a smooth, even layer.
Now, for the Frosting. In a microwavable bowl, combine the semi-sweet chocolate chips and butter. Microwave on High for 30 seconds.
Remove from the microwave and stir until completely smooth. If the chocolate chips haven’t fully melted after 30 seconds, microwave for an additional 10 seconds at a time, stirring after each interval, until melted and smooth. Be careful not to overheat the chocolate, as it can seize.
Let the melted chocolate cool for 10 minutes. This allows it to thicken slightly and prevents it from melting the peanut butter filling.
Spread the cooled chocolate frosting evenly over the peanut butter filling. Again, an offset spatula will help you achieve a smooth, professional-looking finish.
Refrigerate the bars for at least 30 minutes, or until the chocolate is set. This will make them easier to cut and prevent the filling from being too soft.
Once the bars are set, cut them into 9 rows by 4 rows, creating 36 bars. Use a sharp knife for clean cuts. For even neater bars, you can chill the bars for longer and use a warm, wet knife, wiping it clean between cuts.

Expert Tips & Tricks

Softened Butter is Key: Make sure your butter is truly softened for the filling. This will ensure a smooth, creamy texture. If you forgot to take it out ahead of time, you can microwave it for a few seconds at a time, but be careful not to melt it.
Floured Fingers: When pressing the cookie dough into the pan, lightly flour your fingers to prevent sticking. This will make the process much easier.
Microwave Melt with Caution: When melting the chocolate, microwave in short intervals and stir frequently to prevent burning. Burnt chocolate is no fun!
Neat Cuts: For clean, professional-looking cuts, chill the bars thoroughly before cutting and use a warm, wet knife, wiping it clean between each cut.
Extra Chocolate Drizzle: For an extra touch of indulgence, drizzle some melted white chocolate over the top of the cooled bars.

Serving & Storage Suggestions

These Layered Peanut Butter Bars are best served chilled. The cold temperature enhances the contrast between the rich peanut butter and the smooth chocolate. They can be served as a dessert, a snack, or even a sweet treat with coffee or tea.

Storage: Store leftover bars in an airtight container in the refrigerator for up to a week. They can also be frozen for up to 2 months. Thaw in the refrigerator before serving.
Serving: Cut into squares and arrange on a platter for an appealing presentation.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	115.5 kcal	N/A
Calories from Fat	74 g	65%
Total Fat	8.3 g	12%
Saturated Fat	3.8 g	19%
Cholesterol	15.4 mg	5%
Sodium	53 mg	2%
Total Carbohydrate	10.4 g	3%
Dietary Fiber	0.5 g	1%
Sugars	9.4 g	37%
Protein	1.3 g	2%

Note: Nutritional information is an estimate and may vary based on specific ingredients and serving sizes.

Variations & Substitutions

Different Cookie Mix: Experiment with different flavors of Betty Crocker cookie mix. Chocolate chip or sugar cookie mix would also work well.
Nut Butter Variety: Use almond butter, cashew butter, or sunflower seed butter instead of peanut butter for a different flavor profile.
Chocolate Chips: Try using dark chocolate chips or milk chocolate chips instead of semi-sweet.
Salted Caramel Drizzle: Drizzle with salted caramel for a sweet and salty twist.
Add Nuts: Sprinkle chopped peanuts, almonds, or pecans over the chocolate frosting before it sets.

FAQs (Frequently Asked Questions)

Q: Can I use a different size pan?
A: While a 13×9-inch pan is ideal, you can use an 8×8-inch pan for thicker bars. You may need to adjust the baking time accordingly.

Q: My peanut butter filling is too thick. What should I do?
A: Add a teaspoon of milk at a time until you reach the desired consistency. Be careful not to add too much, or it will become too thin.

Q: Can I make these bars ahead of time?
A: Yes! These bars are perfect for making ahead. Simply store them in the refrigerator until ready to serve.

Q: The chocolate frosting is too thick to spread. What can I do?
A: Microwave it for a few seconds at a time, stirring after each interval, until it’s smooth and spreadable.

Q: Can I freeze these bars?
A: Yes, they freeze well. Wrap them tightly in plastic wrap and then place them in a freezer-safe bag or container. Thaw in the refrigerator before serving.

Final Thoughts

These Layered Peanut Butter Bars are a guaranteed crowd-pleaser. They’re easy to make, incredibly delicious, and endlessly customizable. Whether you’re baking for a special occasion or just craving a sweet treat, I highly encourage you to give this recipe a try. Don’t be afraid to experiment with different variations and make it your own! And if you do, I’d love to hear about your creations and any tips you discover along the way. Happy baking!