Whip heavy cream to soft peaks - set aside. Combine mascarpone, sugar, vanilla & eggs- whip together. fold whipped cream into cheese mixture. Use a glass/pyrex 8x8 casserole dish. Quick dip lady fingers 1 at a time into Vanilla Porter. Make a layer of dipped cookies. Spread cheese and cream mixture to cover ½ inch. Dust with coco. Repeat the process. Finish with dusted coco. Refrigerate for 2 hours.