Melt the syrups together

• In a cup or small pitcher, combine the brown butter syrup, chocolate sauce and sugar.
• Warm gently while whisking until everything is melted and smooth.

Add the espresso

• Pour the espresso over the syrup mixture.
• Whisk well until fully combined, then let it cool down slightly.

Make the cookie dough cold foam

• Froth the cold milk with the cookie dough syrup until thick and foamy.

Assemble and serve

• Pour the espresso mixture over ice in a glass.
• Spoon the cookie dough cold foam on top.
• Finish with a drizzle of chocolate sauce and serve.