Preheat oven to 350°.
Grease or lightly spray a 9" square baking pan.
Cream butter in mixer until creamy.
Add brown sugar to butter and mix until lightened and well blended, about 2 minutes.
Add eggs, one at a time, until incorporated.
Add vanilla to mixer.
Combine next 5 ingredients in a medium bowl and lightly stir with a fork.
Add dry ingredients into mixing bowl and mix on low until worked in completely.
Pat ⅔ of mixture into bottom of prepared pan. If needed, use a piece of parchment paper sprayed with cooking spray to help spread it evenly in the pan as the dough will be somewhat sticky.
Spread contents of entire jar of fig butter evenly over crust.
Place (plop!) the remaining crust over the fig jam and lightly press down.
Bake for 25-30 minutes, checking for a golden color on top.
Remove from oven and cool before cutting into bars.