Pre-heat oven to 350℉
In a medium saucepan, mix plums, brown sugar, agave, zest and spices, and heat slowly on low/ medium-low for 30 minutes (you should see bubbles, but barely), stirring occasionally.
Mix the homemade Bisquick, sugar, and butter together in a bowl until it is thoroughly mixed.
In 6 heat-proof containers (ramekins, coffee cups, or I used empty jam jars), layer a sixth of the plums mixture, then sweetened condensed milk, and then cobbler topping in each container and bake for 30 minutes.
Allow to cool for 15 minutes then enjoy!