Hold blueprint in hand and click "Add section" with it. This will add a group with all items from the blueprint.

Then select edit button for the group to set multiplier for item number if you want to have items for placing the blueprint multiple times.

Omg thank you. I personally think this ...

TL;DR
Quick blueprint ingredients into logistics groups
So, What this would essentially be, is. You make a blueprint. maybe you use it alot like a smelter array. You then make an empty logistics group and then pop the selected blueprint onto the group, It'll then take all the ingredients that are ...