Combine sugars, salt, melted butter, and speculoos cookie butter spread in a mixing bowl. Mix until no lumps remain.
Add the egg and vanilla extract and mix until batter is smooth.
With a large sieve, sift flour and baking soda into the batter. Fold until just combined. Do not overmix!
Fold in dried fig chunks, reserving a small handful for later (optional).
Cover mixing bowl with plastic wrap and chill in the fridge for about 30 mins.
Line two baking sheets with parchment paper. With an ice cream scoop, scoop out 1-2 inch spherical mounds of the chilled cookie dough onto baking sheet. Leave at least 2-3 inches between adjacent cookies and sides of the tray for spreading (about 6 cookies per large tray).
With the extra pieces of dried fig you set aside earlier, press a few pieces on top of each cookie dough mound (optional: skip this step if you don't care about "seeing" the fig pieces on the tops of your cookies)
Return tray to the fridge to chill for another 15-30 minutes. Meanwhile, preheat oven to 350°F (180°C).
Bake for 13-15 minutes, or until the edges of the cookies just begin to lightly brown. Do not overbake! They should be still be soft and will firm up as they cool.
Let cool for 3-5 minutes on baking tray before transferring to a cooling rack. Preferably enjoy while still warm!