The Best Chocolate Chip Cookie Bars Recipe
The BEST Chocolate Chip Cookie Bars Recipe is a easy American recipe that serves 9. 230 calories per serving. Recipe by Preppy Kitchen on YouTube.
Prep: 20 min | Cook: 55 min | Total: 1 hr 30 min
Cost: $4.63 total, $0.51 per serving
Ingredients
- 2.25 cups All-Purpose Flour (sifted)
- 1 tablespoon Cornstarch (helps create a tender crumb)
- 1 teaspoon Baking Soda (leavening agent)
- 1 teaspoon Salt (regular table salt; flaky sea salt optional for topping)
- 0.66 cups Granulated Sugar (approximately 2/3 cup (133 g))
- 1 cup Brown Sugar (packed (220 g))
- 0.75 cup Unsalted Butter (melted and slightly cooled (170 g))
- 2 pieces Large Eggs (room temperature)
- 1 tablespoon Vanilla Extract (pure vanilla (15 ml))
- 2 cups Semi-Sweet Chocolate Chips (reserve ¼ cup for topping)
- 1 tablespoon Flaked Sea Salt (optional, for finishing)
Instructions
Preheat Oven
Set the oven to 350°F (177°C) and let it preheat while you prepare the batter.
Time: PT10M
Temperature: 350°F
Combine Dry Ingredients
In a large mixing bowl, whisk together the flour, cornstarch, baking soda, and salt until evenly distributed.
Time: PT5M
Melt Butter
Melt the butter in a saucepan over low heat, then let it cool slightly so it’s warm, not hot.
Time: PT5M
Mix Wet Ingredients
In a second large bowl, whisk the melted butter with granulated sugar and brown sugar for about 30 seconds. Add the eggs and vanilla, then whisk for another minute until the mixture is smooth and slightly thick.
Time: PT3M
Combine Wet and Dry
Add the wet mixture to the dry ingredients. Stir with a spatula just until combined; a few flour streaks should remain.
Time: PT2M
Fold in Chocolate Chips
Fold in 1¾ cups of chocolate chips, reserving ¼ cup for the top of the bars.
Time: PT2M
Line the Pan
Cut a square of parchment paper to fit an 8×8‑inch pan, place it inside, and fold the excess edges under the pan edges.
Time: PT5M
Transfer Batter and Add Topping
Pour the batter into the lined pan, smooth the surface with a spatula, and sprinkle the reserved ¼ cup of chocolate chips over the top.
Time: PT3M
Bake
Bake for 55 minutes, checking at 30 minutes and loosely covering the top with foil to prevent over‑browning. The bars are done when a skewer inserted in the center comes out with a few moist crumbs and the edges are set.
Time: PT55M
Temperature: 350°F
Cool and Cut
Allow the bars to cool in the pan on a rack for about 10 minutes, then lift the parchment and transfer to a cutting board. Cut into 9 equal squares (or desired size).
Time: PT15M
Nutrition Facts
- Calories
- 230
- Protein
- 2 g
- Carbohydrates
- 30 g
- Fat
- 12 g
- Fiber
- 1 g
Dietary info: Vegetarian, Contains Gluten, Not Vegan
Allergens: Wheat, Eggs, Milk, Soy
Ingredient Substitutions
- Instead of All-Purpose Flour: Pastry Flour, Whole Wheat Flour
- Instead of Cornstarch: Potato Starch, Tapioca Starch
- Instead of Baking Soda: Baking Powder (1/3 tsp + extra acid)
- Instead of Salt: Kosher Salt
- Instead of Granulated Sugar: Superfine Sugar
- Instead of Brown Sugar: Dark Brown Sugar, Coconut Sugar
- Instead of Unsalted Butter: Salted Butter (reduce added salt), Margarine
- Instead of Large Eggs: Egg Replacer
- Instead of Vanilla Extract: Vanilla Bean Seeds, Almond Extract (½ tsp)
- Instead of Semi-Sweet Chocolate Chips: Chopped Chocolate Bar, M&M's, Dairy‑Free Chocolate Chips
- Instead of Flaked Sea Salt: Kosher Salt
Equipment Needed
- Large Mixing Bowl
- Whisk
- Measuring Cups and Spoons
- Spatula
- 8×8‑Inch Baking Pan
- Parchment Paper
- Oven
- Aluminum Foil
- Cooling Rack (optional)
- Knife or Bar Cutter (optional)
- Oven Mitts
Critical Steps — Do Not Skip
- Preheat oven to 350°F before mixing.
- Do not over‑mix the wet and dry ingredients; stop when flour streaks remain.
- Cover the bars with foil after 30 minutes to control browning.
- Check doneness with a skewer – a few moist crumbs are ideal.
Chef Tips from the Video
- For an extra depth of flavor, brown the butter before melting; let it cool before adding to the wet mix.
- Use high‑quality semi‑sweet chocolate chips for the best melt and flavor.
- A light sprinkle of flaky sea salt just before serving enhances the chocolate’s sweetness.
Troubleshooting
Bars are dry and crumbly.
Reduce bake time by 5‑10 minutes or add an extra tablespoon of melted butter to the batter.
Top becomes too dark before the center is set.
Cover the pan with foil at the 20‑minute mark or lower the oven temperature to 325°F.
Bars spread too thin and are flat.
Chill the batter for 30 minutes before baking, or use a slightly smaller pan.
Storage
Refrigerator: Store in an airtight container for up to 5 days.
Freezer: Wrap tightly in plastic wrap and foil; freeze for up to 2 months.
Room temperature: Can sit at room temperature for up to 1 day, but texture is best when chilled.
Make-Ahead Tips
- The batter can be refrigerated, covered, for up to 24 hours before baking.
- Baked bars freeze well; wrap individual pieces in parchment before placing in a freezer bag.
Frequently Asked Questions
What is the cultural significance and history of chocolate chip cookie bars in American cuisine?
Chocolate chip cookie bars evolved from the classic American chocolate chip cookie, a 1930s invention by Ruth Wakefield. Turning the cookie into a bar format made it easier to serve at gatherings and allowed a softer, gooier texture that became popular in school cafeterias and bake‑sale tables.
How do chocolate chip cookie bars differ from traditional chocolate chip cookies in texture and serving style?
Bars are baked in a single pan, creating a uniform, soft‑chewy interior with a slightly crisp edge, whereas individual cookies have a more varied crust‑to‑center ratio. Bars are cut into portions, making them ideal for pot‑luck servings and portion control.
What regional variations of chocolate chip cookie bars exist within the United States?
In the Pacific Northwest, bakers often add toasted walnuts or hazelnuts. Southern versions may incorporate a swirl of caramel or a drizzle of pecan praline. Some New England bakers sprinkle a pinch of sea salt on top for a sweet‑salty contrast.
What occasions or celebrations are chocolate chip cookie bars traditionally associated with in American culture?
They are a staple at school bake sales, birthday parties, and holiday gatherings because they can be made ahead, served in bite‑size pieces, and stay fresh for several days. They’re also popular for casual weekend brunches.
What authentic ingredients are traditionally used in American chocolate chip cookie bars and what are acceptable substitutes?
The classic recipe calls for all‑purpose flour, unsalted butter, granulated and brown sugars, semi‑sweet chocolate chips, and vanilla extract. Substitutes include whole‑wheat flour (for a nuttier flavor), melted salted butter (reduce added salt), or dark chocolate chips for a richer taste.
What other American desserts pair well with chocolate chip cookie bars?
Serve them alongside vanilla ice cream for a warm‑cold contrast, or with a glass of cold milk. They also complement fruit cobblers, banana pudding, or a simple caramel sauce drizzle.
What are the most common mistakes to avoid when making chocolate chip cookie bars?
Common errors include over‑mixing the batter, which develops gluten and makes the bars tough, and baking too long, which dries out the center. Also, failing to cover the top with foil can lead to an overly dark crust.
Why does this recipe use cornstarch in the dry mix instead of more flour?
Cornstarch softens the gluten network created by the flour, giving the bars a tender, melt‑in‑your‑mouth crumb that mimics the texture of a freshly baked cookie.
Can I make the chocolate chip cookie bars ahead of time and how should I store them?
Yes. After cooling, store the bars in an airtight container in the refrigerator for up to five days. For longer storage, wrap each bar in parchment and freeze; they reheat well in a 300°F oven for 5‑7 minutes.
What does the YouTube channel Preppy Kitchen specialize in?
The YouTube channel Preppy Kitchen focuses on approachable, home‑cooked recipes that blend classic comfort food with modern twists, delivering clear step‑by‑step tutorials for busy home cooks.
How does the YouTube channel Preppy Kitchen's approach to American baking differ from other cooking channels?
Preppy Kitchen emphasizes quick, budget‑friendly techniques, often using pantry staples and offering optional upgrades (like browned butter) while maintaining a friendly, conversational style that encourages viewer participation.
Last updated: August 30, 2026
