Combine the Dark Chocolate Chips (1/4 cup) and Vegetable Oil (1 tablespoon) in a microwave-safe mug and heat in the Panasonic Microwave Oven on high for about 45 seconds to melt them together. Stir them both together until you have a smooth base.
Stir in the Unsweetened Cocoa Powder (1 tablespoon), Bailey's® Irish Cream (1 tablespoon), Caster Sugar (1 teaspoon), and the Egg (1), then microwave it all for another minute. The edges should get slightly crisp while still being soft in the middle.
Let it sit and cool for 5 minutes, then enjoy warm with an extra sprinkle of Powdered Confectioners Sugar (to taste) on top! Cooking results may vary depending on microwave oven used.