Morbidly Obese Tire

I like Fat Tire. It's one of my favorite American brews. But I have a problem. I live east of the Mississippi where Fat Tire is practically non-existent. So, being a home brewer, I figured it was up to me to make my own. Here's the recipe I used.

Morbidly Obese Tire

0.5 lb. Victory Malt
0.5 lb. Briess Caramel 60

6 lb. Northern Brewer Munich Malt Syrup
1 lb. Munton's Plain Extra Light DME

1 oz. Liberty Hops (60 min) 3.6% Alpha
0.5 oz. Hallertau hops (15 min) 4.2% Alpha
0.5 oz. Hallertau hops (5 min) 4.2% Alpha

1 tsp Irish moss
1 tsp gypsum

Wyeast 1762 Belgian Abbey II (125 mL)

1. Steep grains at 150F for 15 min in ~3 gal
2. Heat and remove grains when temp. reaches 170F. Heat to boil
3. Remove from heat and add malt extract. Heat to boiling
4. Add hops according to schedule above.
5. With 15 min. remaining, add 1 tsp. Irish moss, 1 tsp. gypsum
6. Remove from heat, remove hops. Steep for 15 min.
   
7. Transfer 1 quart of wort to sterile container, seal and place in fridge.
8. Cool remaining wort to about 75F, transfer to primary (about 2.25 gal), dilute to 4.75 gal with tap water (OG:1.066) and pitch yeast.
   

I decided to try something new this time and I saved a quart of wort to add for a second fermentation. But still, after doing this, I ended up with a gravity of 1.066. Doing some rough calculations and figuring on about 0.15 gal loss for each transfer, it looks like when I add the remaining wort for a second fermentation, I'm looking at a rough OG of about 1.070. And if I get good attenuation (~75%), I'm looking at an expected alcohol percentage somewhere between 6-7%. I wasn't shooting for a decently strong alcohol beer, but what the hell? Hence the name, Morbidly Obese Tire.

The good news is that when I racked for the second fermentation, the trub smelled slightly biscuity like Fat Tire, so we'll see what happens.

Update: The rough numbers I was working with didn't sit too well with me. It didn't make sense that adding a small amount of extra wort was almost doubling the quantity of sugar. So I found my mistake in my spreadsheet and fixed the problem. The edits are in red above.