Start with 2.5 gallons and you will end up with just about 2 gallons for bottling.
This should place you smack in the middle of the style American Amber Ale.
The 5 minutes boil for Cascade will give citrus and a nice aroma.
Boil Size: 3.92 gal
Post Boil Volume: 3.38 gal
Batch Size (fermenter): 2.50 gal
Bottling Volume: 2.10 gal
Estimated OG: 1.048 SG
Estimated Color: 15.3 SRM
Estimated IBU: 31.3 IBUs
Brewhouse Efficiency: 72.00 %
Boil Time: 60 Minutes
Est. ABV: 5%
3 lbs 8.0 oz 2-Row
1 lbs Crystal 60, 2-Row
1.5 oz Cara-Pils/Dextrine for head retention
1.0 oz Roasted Barley for deeper amber
0.5 oz Centennial [10.00 %] - Boil 50.0 min Hop
0.5 oz Cascade [5.50 %] - Boil 5.0 min Hop
1.0 pkg Safale American (DCL/Fermentis #US-05) Yeast
Mash In Add 5.85 qt of water at 164.9 F
Mash at 150.0 F for 75 min
Sparge with 3.28 gal water at 168.0 F
Chill, into the fermenter, sprinkle the yeast on top.
2 weeks in the fermenter
Carbonate to 2.3 volumes
Dissolve 3 tablespoons (1.4 dry oz) of table sugar in a little wort - pour this into the batch just prior to bottling.
2 weeks in the bottle.