Line a baking sheet with parchment paper or silicone mat and set aside.
In a large heavy bottomed pan with a lid, heat oil and 2-3 popcorn kernels, over mdium heat. This will take a few minutes. Be sure to cover with lid while heating.
Once kernels have popped, the oil is hot enough to add the remaining kernels.
Quickly pour maple syrup over kernels and add salt. Cover until the kernels begin to pop and then tilt the lid slightly to allow steam to escape.
Gently shimmy and swirl the pan the whole time to prevent the syrup and kernels from burning. Continue to cook until the popping slows down to once every few seconds.
When popping slows, remove pot from heat and wait for popping to stop completely.
Once popping stops, pour the popcorn on the prepared baking sheet to cool for a few minutes.
Break up any large clumps of popcorn and serve. Any leftover popcorn can be stored in air tight containers for 2-3 days.