You have flakes or small pieces of different colors of dough. Do you pluralize these and say, "pick up all these or doughs?
Dough is considered uncountable like sugar, water, advice and money.
If you need to make it countable you need to introduce a unit. This may be a precise unit like teaspoons of sugar or buckets of water or abstract terms like some advice or all money.
So in yor example, you can either say:
pick up all / all the dough
pick up all pieces/crumbs/flakes of dough
cambridge labels dough as [ C or U ], which means Countable or Uncountable.
You could use dough as Uncountable
pick up 3 pieces of dough
You could also use dough as Countable
pick up 3 doughs