Calculating nutritional info for this recipe

So a few questions:

1. does serving equal one unit of a recipe or the entire outcome of the recipe?
2. I made this https://www.reddit.com/r/ketorecipes/comments/32i10q/if_there_was_ever_a_keto_brownie_recipe_to_try_i/ recipe
3. my pan was too big so I doubled the recipe
4. does this mean my nutritional info per unit of the brownie increases? according to the original each recipe= 4 servings, each unit is 275 cals with 3g net carbs. since I doubled, does it mean each unit is now 6 carbs?!
5. I hope I've abided by the guidelines for posting and have been clear in describing my problem, sorry if this is too silly!

EDIT: this is the recipe doubled

12 tbsp butter

2 eggs

2*1/3 cup of almond flour

2*1/3 cup of swerve

2*1/3 cup of cocoa powder (unsweetened)

submitted by /u/SaltyPositive
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from Eating Keto Style! | Low-Carb Recipes for the Keto Diet https://ift.tt/2sD4TnX