In a large bowl, whisk heavy cream with sugar until soft peaks form. In a separate large bowl, add the espresso powder and condensed milk and blend until espresso powder is dissolved. Whisk in Irish cream then fold in whipped cream. Pour evenly into the ramekins. Top with remaining gingersnap crumbs and cover with the extra plastic wrap, pressing to compact mixture. Freeze until set, about 5 hours. To serve, remove plastic wrap from top and then gently turn ramekins over to release dessert onto a serving plate. Gently remove plastic wrap.