Make a batch of popcorn in your microwave and toss it with melted butter and one or more flavor-packed spices. Will you use warm spices, like cinnamon and nutmeg? What about spices inspired by a favorite dish, like garlic powder and oregano (for garlic bread), or chili powder and cumin (for fajitas)? Or spices that have a bit of heat, such as cayenne pepper or ground ginger? You could even try a few different spice combinations and have a taste test with your family and friends!
Place popcorn kernels in clean brown paper lunch bag. Drizzle kernels with oil. Fold over top of bag three times to seal (do not tape or staple).
Shake bag to coat kernels with oil, place bag on its side on large microwave-safe plate, and shake kernels into even layer in bag.
Place butter, sugar (if using), salt, and your chosen spices in large microwave-safe bowl (big enough to hold popcorn), cover with plate, and heat in microwave at 50 percent power until melted, 30 to 60 seconds. Use oven mitts to remove bowl from microwave.