If you’re a fan of rich chocolate desserts and iconic chocolate biscuits, these Tim Tam Chocolate Cookie Bars are about to become your new favorite treat. Inspired by the famous Australian Tim Tam cookies, these homemade bars feature a soft chocolate cookie base, a luscious peanut butter or chocolate cream filling, and a silky milk chocolate coating that creates the perfect balance of creamy, crunchy, and fudgy textures.
Perfect for holidays, bake sales, afternoon coffee, or satisfying late-night chocolate cravings, these bars are surprisingly easy to make using simple pantry ingredients. They look like gourmet bakery treats but require no special equipment or advanced baking skills.
Why You’ll Love These Tim Tam Chocolate Cookie Bars
These bars combine everything chocolate lovers crave into one irresistible dessert.
Why This Recipe Works
- Rich, fudgy chocolate cookie base
- Creamy filling with the perfect sweetness
- Thick chocolate coating
- Better than store-bought candy bars
- Easy to prepare
- Perfect for freezing
- Great for parties and holiday dessert trays
Each bite delivers layers of chocolate flavor with a smooth, creamy center that melts in your mouth.
Ingredients
For the Chocolate Cookie Base
- 1 cup unsalted butter, softened
- 1 cup granulated sugar
- ½ cup brown sugar
- 2 large eggs
- 2 teaspoons vanilla extract
- 2 cups all-purpose flour
- ¾ cup unsweetened cocoa powder
- 1 teaspoon baking powder
- ½ teaspoon salt
For the Cream Filling
- 1 cup creamy peanut butter (or chocolate hazelnut spread)
- ½ cup unsalted butter, softened
- 2 cups powdered sugar
- 1 teaspoon vanilla extract
- Pinch of salt
For the Chocolate Coating
- 2 cups milk chocolate chips
- 2 tablespoons coconut oil
Optional Garnish
- Chocolate drizzle
- Chocolate curls
- Sea salt flakes
- Crushed Tim Tam cookies
Equipment
- 9×13-inch baking pan
- Mixing bowls
- Electric mixer
- Offset spatula
- Parchment paper
- Microwave-safe bowl
Step-by-Step Instructions
Step 1: Bake the Chocolate Base
Preheat your oven to 350°F (175°C).
Line a 9×13-inch baking pan with parchment paper.
Cream together the butter and both sugars until light and fluffy.
Beat in the eggs one at a time, then add the vanilla.
In another bowl, whisk together the flour, cocoa powder, baking powder, and salt.
Gradually mix the dry ingredients into the wet ingredients until combined.
Spread the dough evenly into the prepared pan.
Bake for 20–25 minutes, or until the center is just set.
Allow the base to cool completely.
Step 2: Make the Cream Filling
Using an electric mixer, beat together:
- Peanut butter
- Softened butter
- Powdered sugar
- Vanilla
- Salt
Beat until smooth, fluffy, and creamy.
Spread evenly over the cooled chocolate base.
Smooth the surface with an offset spatula.
Refrigerate for 30 minutes.
Step 3: Prepare the Chocolate Coating
Place the chocolate chips and coconut oil into a microwave-safe bowl.
Heat in 30-second intervals, stirring after each, until completely smooth.
Pour the melted chocolate over the chilled filling.
Spread gently into an even layer.
If desired, drizzle with extra melted chocolate for decoration.
Step 4: Chill
Refrigerate for at least 2 hours, or until the chocolate coating is firm.
For the cleanest slices, chill overnight.
Tips for Perfect Bars
- Don’t overbake the chocolate base.
- Use room-temperature butter for a smoother filling.
- Chill each layer before adding the next.
- Warm your knife before slicing for clean bakery-style edges.
- Use quality chocolate for the best flavor.
Delicious Variations
Double Chocolate
Add chocolate chips to the cookie dough.
Cookies & Cream
Mix crushed chocolate sandwich cookies into the filling.
Salted Caramel
Spread a thin layer of caramel sauce over the filling before adding the chocolate coating.
Mint Chocolate
Add ½ teaspoon peppermint extract to the filling for a refreshing twist.
White Chocolate
Replace the milk chocolate coating with melted white chocolate for a different look and flavor.
Storage
Refrigerator
Store in an airtight container for up to 5 days.
Freezer
Freeze individually wrapped bars for up to 3 months.
Thaw in the refrigerator overnight before serving.
Serving Suggestions
These bars are delicious served with:
- Fresh coffee
- Espresso
- Hot chocolate
- Cold milk
- Vanilla ice cream
They’re also perfect for dessert platters, birthdays, holidays, and homemade gifts.
Frequently Asked Questions
Can I make these ahead of time?
Yes. They’re even better after chilling overnight.
Can I freeze them?
Absolutely. Wrap each bar individually and freeze for up to three months.
Can I use dark chocolate?
Yes. Dark chocolate creates a richer, less sweet finish.
Can I use crunchy peanut butter?
Yes, although the filling will have more texture.
Why is my chocolate coating cracking?
Allow the bars to sit at room temperature for about 5 minutes before slicing and always use a warm knife.
Final Thoughts
These Tim Tam Chocolate Cookie Bars deliver everything you could want in a homemade dessert—rich chocolate flavor, a creamy filling, and a smooth chocolate coating that makes every bite completely irresistible. Whether you’re baking for a special occasion or simply treating yourself, these bars are guaranteed to impress family and friends.