This decadent trifle is layers of dark chocolate whipped cream, dark chocolate brownies, strawberries, and Oreos.
With a mixer, beat the heavy cream on med-high speed until it begins to thicken, about 3-4 minutes depending upon the power of your mixer.
Turn the mixer off and add in cocoa powder, powdered sugar, salt, and espresso powder.
Turn the mixer back on, and beat on med-high speed until the cream forms stiff peaks and has the consistency of whipped cream, about 2-3 more minutes.