An ooey gooey chocolate Paleo Lava Mug Cake that can be made in minutes. A nut-free recipe that's great for those with nut allergies, thanks to tigernut!
Melt butter in large microwave-safe mug for 15 seconds.
Whisk in vanilla, baking soda, vinegar, salt, syrup, and sugar very well with a fork.
Whisk in egg to emulsify everything.
Whisk in flours and cocoa until lumps are mostly gone and mixture is smooth, shiny, and velvety.
Cook on HIGH in center of microwave for 30 seconds.
Turn mug 45 degrees and offset the mug just a bit from the center of the microwave. Cook for 10 seconds and check to see if the top has just barely set.
Overcooking will cook all of the "lava" that forms under and around the edges of the cake....so be sure to under-cook it first and test to see if it's gooey.
Top with optional chocolate chips if desired immediately after top is set so that they can melt slightly.