Preheat oven to 350 conventional/ 325 convection
In mixer bowl- combine flour, salt, sugars, baking powder & spice - mix with paddle about 30 seconds
In a large measuring cup - add pumpkin puree, eggs & vanilla - mix well
Add to dry mixture & beat well.
Mixture should be very thick - not like cake batter.
Add additional flour if needed up to 1 cup- it should be quite firm & hold it's shape
Beat in caramel bits
Divide dough into 2-3 portions & place on parchment lined baking sheet & shape into a log.
Bake 28-30 minutes
Remove & allow to cool about 15 minutes
Slice into 3/4" pieces & lay flat
Bake additional 8-10 minutes
Remove & flip each piece over & return to oven to bake a final 8-10 minutes
Allow to cool on baking sheet before storing in airtight container