Add the butter, sugars, vanilla and egg yolk to a microwave safe dish like a ramekin or mug. (A flat 4-inch/8oz ramekin will bake more evenly than a mug, just FYI.) Mix well.
Add the flour, salt, and chocolate chips. Mix and flatten the top evenly. Top with extra chocolate chips, if desired.
Cook in the microwave for 40 to 60 seconds until just set. Time will vary depending on the dish used and power of the microwave. Enjoy warm!
Video
Notes
EGGLESS VERSION:
1 Tbsp (14 g) butter, melted
1 Tbsp granulated sugar
1 Tbsp brown sugar
⅛ tsp vanilla
1 Tbsp milk (preferably whole milk)
3 Tbsp all-purpose flour
⅛ tsp salt (don't skip!)
2 Tbsp chocolate chips
Directions:
Add the butter, sugars, vanilla and milk to a microwave safe dish like a ramekin or mug. (A flat 4-inch/8oz ramekin will bake more evenly than a mug, just FYI.) Mix really well to help dissolve the sugars.
Add the flour, salt, and chocolate chips. Stir well.
Cook in the microwave for about 40-45 seconds. Time will vary depending on the dish used and power of the microwave. Enjoy warm!