Preheat oven to 350F (180C). Line the bottom of an 8-inch (20 cm) square baking pan with parchment paper. Grease the parchment with butter, set aside.
Make the brownies: Chop the chocolate and transfer into heat proof bowl, add butter, instant coffee and set the bowl over a double boiler (a pot with simmering water). Melt completely and set aside to cool slightly.
In a large bowl place white sugar, brown sugar and eggs. Beat until light and fluffy.
Add salt, then slowly pour in chocolate mixture while constantly mixing.
Sift int flour and cocoa powder. Fold just until combined. Do not over mix.
Make the caramel: place the sugar into a saucepan and heat it over medium-low heat, stirring occasionally with a spatula or wooden spoon. Sugar will form clumps and eventually melt into a thick golden brown colored liquid as you continue to stir. Once all the sugar has melted and turned golden in color, remove the sauce pan from heat, add in the butter right away. Stir quickly until the butter is incorporated. Then add in the room temperature heavy cream and stir quickly again to incorporate everything together.
Add salt and cook over medium heat for about 1 minute. Allow to cool.
Spread half of the brownie batter in prepared pan, then spread the caramel sauce, then the remaining brownie batter on top of the caramel.
Bake for 25-35 minutes.
Allow to cool before cutting into squares.
FAQs
Can I use milk chocolate instead of dark chocolate for the brownies?
Yes, you can use milk chocolate if you prefer a less intense chocolate flavor. However, keep in mind that milk chocolate is sweeter and may alter the overall sweetness of the brownies.
How do I know when the sugar has caramelized enough for the sauce?
The sugar should turn a deep amber color and have a rich caramel aroma. Be careful not to let it burn, as it can happen quickly.
Can I use salted butter for the caramel sauce instead of adding salt separately?
Yes, you can use salted butter, but adjust the amount of additional salt added to the caramel to taste.
Can I omit the instant coffee in the brownie recipe?
Yes, you can omit the instant coffee. It enhances the chocolate flavor, but the brownies will still be delicious without it.
How long does it take for the caramel sauce to cool before using it in the brownies?
The caramel sauce should cool for about 10-15 minutes, or until it has thickened slightly but is still pourable.
Can I freeze the brownies after baking them?
Yes, you can freeze the brownies. Wrap them tightly in plastic wrap and then in aluminum foil before placing them in the freezer. They will keep for up to 3 months.
What's the best way to store leftover salted caramel sauce?
Store leftover caramel sauce in an airtight container in the refrigerator for up to two weeks. Reheat gently before using.
Can I use a different type of salt for the caramel sauce?
Yes, you can use different types of salt, such as sea salt or Himalayan pink salt, but adjust the amount to taste as some salts are saltier than others.
Can I use caramel sauce from a store instead of making it from scratch?
Yes, you can use store-bought caramel sauce, but homemade caramel sauce will give you the best flavor and texture.
Can I use a different size pan if I don't have an 8-inch square pan?
Yes, you can use a different size pan, but adjust the baking time accordingly. A larger pan will result in thinner brownies and may require less baking time, while a smaller pan will result in thicker brownies and may require more baking time.