In a medium-sized mixing bowl, whisk together the chocolate pudding mix with the milk. After two minutes, cover with plastic wrap and place in the refrigerator to set.
Cut 8 of the donuts into large chunks, leaving 4 of them whole. (Three will be used for layering the trifle and one will be used for garnish.)
In a stand mixer, whip the heavy cream into it forms soft peaks, about 3 minutes. Add sugar, espresso powder and salt and whip a little more just to incorporate.
Pour coffee into a shallow dish or pie pan.
In large trifle dish, or glass bowl, build the trifle. (Tip: To make the layering easier, place the whipped cream and pudding into piping bags.) Before layering the donut or donut pieces, dunk them in the coffee for just a few seconds. Place one whole dunked donut in the middle of the bottom of the dish and scatter 1/3 of the donut chunks around it. Next, put a layer of 1/3 of the pudding and top that with 1/3 of the whipped cream mixture. Repeat the layer process 2 more times.
Place the trifle in fridge for a few hours or overnight.
Before serving, top with more whipped cream and dust with cocoa powder to create the illusion of a coffee drink. Cut a slit into the leftover whole donut and hang it over the edge of the glass, like a lime in a cocktail.