Whole Jar Peanut Butter Cookies

These Whole Jar Peanut Butter Cookies are exactly what a peanut butter cookie should be; deeply nutty, buttery, soft in the center, and just a little crisp around the edges. Using an entire 18-oz jar of peanut butter gives them an especially rich, creamy texture, while chopped peanuts add a satisfying crunch. Brown sugar helps keep the centers moist, and that extra egg yolk gives the dough a little more richness.

This is the kind of old-fashioned cookie recipe I keep around when I want something dependable for a bake sale, cookie tray, or after-school treat. The most important trick is simple: don’t overbake them. Pulling the cookies while they’re still slightly soft produces that wonderful tender texture once they cool. The chilled dough is also easy to portion, making a big batch surprisingly manageable.

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Ingredients

1 cup unsalted butter, softened
1 cup granulated sugar
1 cup packed light brown sugar
2 large eggs
1 large egg yolk
2 tsp vanilla extract
18 oz creamy peanut butter

2 cups all-purpose flour
1 tsp baking soda
½ tsp salt
1 cup peanuts, chopped

Instructions

1. Cream the butter and sugars. In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until smooth, creamy, and slightly fluffy.
2. Add the eggs. Beat in the eggs and additional egg yolk, followed by the vanilla. Continue mixing until the mixture looks light and well combined.
3. Mix in the peanut butter. Add the entire jar of peanut butter and beat just until evenly incorporated.
4. Add the dry ingredients. In a separate bowl, whisk together the flour, baking soda, and salt. Gradually mix the dry ingredients into the peanut butter mixture. Stop mixing as soon as no dry streaks of flour remain.
5. Fold in the peanuts. Stir in the chopped peanuts until evenly distributed throughout the dough.
6. Chill the dough. Cover and refrigerate for at least 2 hours. Chilling firms the dough and helps prevent excessive spreading.
7. Prepare the oven. Preheat the oven to 175°C / 350°F. Lightly grease a baking sheet or line it with parchment paper.
8. Shape the cookies. Roll the chilled dough into walnut-size balls and arrange them several inches apart on the prepared baking sheet. Gently flatten each ball with the tines of a fork.
9. Bake. Bake for 12-15 minutes. The tops should appear dry and set, but the centers can still look slightly soft.
10. Cool. Leave the cookies on the baking sheet for several minutes before transferring them to a wire rack. Let them cool completely before storing.

Cooking Notes

Avoid overbaking. These cookies are especially good when removed from the oven while the centers are still slightly underdone. Residual heat continues cooking them on the baking sheet.

Chill for the full 2 hours. The large amount of peanut butter and butter makes the unchilled dough quite soft. Proper chilling produces thicker, easier-to-handle cookies.

Measure the flour carefully. Spoon flour into the measuring cup and level it rather than packing it down. Excess flour can turn a soft peanut butter cookie dry and crumbly.

Peanut butter matters. Conventional creamy peanut butter provides the most predictable texture. Natural peanut butter that separates significantly may make the dough oilier or alter spreading.

For fewer crunchy pieces, omit the chopped peanuts. The cookies will still have plenty of peanut flavor.

Nutrition

Yields: 30 servings, approximately 2 cookies per serving

A serving of two cookies is appropriate for this rich dessert. The recipe produces approximately 60 cookies, with moisture loss during baking reducing the final weight of the dough without substantially reducing its calories or macronutrients.

Estimated Nutrition per Serving

Calories: 272 kcal
Fat: 18.0 g
Carb: 25.0 g
Protein: 7.0 g

Nutrition is an estimate; values vary with the peanut butter, butter, peanut brand, and exact cookie size.

Recipe Science

Whole Jar Peanut Butter Cookies use a high proportion of peanut butter alongside butter, two types of sugar, eggs, flour, and chopped peanuts. Creaming the butter and sugars introduces small pockets of air, while the eggs provide moisture and structure. Chilling the finished dough is particularly important because the relatively high fat content would otherwise encourage excessive spreading during baking.

Brown sugar contains more moisture than granulated sugar and contributes to a softer, chewier interior, while granulated sugar assists with spreading and edge crispness. The additional egg yolk contributes fat and emulsifiers, supporting tenderness and richness. Baking soda promotes browning and helps control the cookie’s final texture. A 12-15 minute baking window allows the exterior to set while leaving enough moisture in the center for a soft cookie after cooling.

The chilled dough can be prepared ahead and refrigerated before baking. Baked cookies should be cooled completely before airtight storage and can be briefly reheated for a softer texture. Chopped peanuts can be omitted when a smoother cookie is preferred.

Dietary Notes & Health Alerts: Based on the supplied nutrition information, approximately 6 g saturated fat represents 30% of the FDA Daily Value of 20 g, making saturated fat High per serving. Approximately 16 g total sugar was reported in the source recipe; much of it is added sugar, and the recipe’s measured granulated and brown sugars indicate that added sugar per serving likely exceeds the 20% Daily Value threshold of 10 g. Sodium, at approximately 210 mg per serving, is below 20% of the 2,300 mg Daily Value. For a lighter portion, serve one cookie rather than two; using unsalted peanuts can also help limit sodium.

Why You’ll Love This Recipe

• Serious Peanut Butter Flavor: An entire 18-oz jar delivers a much deeper peanut flavor than the average peanut butter cookie.
• Soft, Moist Centers: Brown sugar and an additional egg yolk help create a tender texture that stays pleasantly rich.
• Crunch in Every Batch: Chopped peanuts contrast nicely with the creamy cookie base.
• Perfect for Sharing: A batch makes about 5 dozen cookies, giving you plenty for parties, bake sales, and cookie boxes.
• Make-Ahead Friendly: The required chilling time means the dough can conveniently be prepared before you’re ready to bake.

FAQ

• Can I make the dough ahead of time? Yes. Keep the dough tightly covered in the refrigerator and bake it once thoroughly chilled. Let very firm refrigerated dough sit briefly at room temperature if it becomes difficult to scoop.
• Why did my cookies spread too much? The dough may not have been chilled long enough, or the butter may have been excessively warm. Give it at least 2 hours in the refrigerator before shaping.
• Can I use crunchy peanut butter? Yes. It will give the cookies even more peanut texture, although the finished consistency may differ slightly.
• How do I know when they’re done? Look for a dry, set surface and lightly set edges. The middle should remain soft; waiting until the entire cookie feels firm can result in overbaking.
• Can I freeze these cookies? Yes. Cool them completely, seal them in an airtight freezer container, and freeze. Thaw at room temperature before serving.

Conclusion

There is something wonderfully satisfying about a cookie that commits completely to peanut butter, and this big-batch recipe does exactly that. Remember, baking is a journey, so don’t hesitate to adjust the size, crunch, or bake time until these cookies are just right for your family.

What do you like with a warm peanut butter cookie; a cold glass of milk, a cup of coffee, or something else? Happy baking, friends!