1. Make the Crust & Crumble
In a bowl, combine graham cracker crumbs, flour, brown sugar, cinnamon, and salt. Stir in melted butter until mixture resembles damp sand. Press two-thirds of this mixture firmly into the bottom of a greased 9×13-inch baking dish to form the crust. Reserve the rest for the crumble topping.
2. Prepare the Coffee Filling
In a medium bowl, whisk together sweetened condensed milk, dissolved coffee granules (mix them in the hot water first), egg yolks, and vanilla. Beat until smooth and creamy.
3. Assemble the Bars
Pour the coffee filling over the prepared graham crust. Sprinkle the reserved crumble mixture evenly on top, letting little clumps form for texture.
4. Bake to Perfection
Bake at 350°F (175°C) for 25–30 minutes, or until the top is lightly golden and set. Allow bars to cool completely before slicing for neat squares.
Serving Suggestions
- Dust with powdered sugar before serving.
- Pair with a hot cappuccino or iced coffee for the ultimate treat.
- Drizzle with chocolate ganache if you’re a mocha lover.
Storage Tips
Keep in an airtight container at room temperature for up to 2 days, or refrigerate for 5 days. These bars also freeze well — just wrap tightly in parchment paper and freeze for up to 2 months.
Why These Bars Work
The buttery graham base anchors the sweetness, while the coffee filling adds a bold, creamy punch. The crumble topping gives it that bakery-style finish with every bite. It’s indulgent without being overwhelming, striking the perfect harmony between comfort and sophistication.
Final Note: Coffee Crumble Graham Bars are for anyone who believes dessert should come with a little jolt of joy. Whether you’re a coffee fanatic or just love a unique spin on classic bars, these will quickly become a staple in your kitchen.