#### Richie_asg1

##### Junior Member

I used the Brewers friend recipe builder to cobble together two existing recipes for something similar to Hobgoblin British brown ale.

2.5kg Maris Otter

200g Crystal Malt

90g Chocolate Malt

Total 2.78kg

12L strike water 70°C

Mash 68°C 40 minutes

Lift to drain,

Sparge at 70°C with 4L 5 mins.

Boil 60 Minutes.

Hops-

5g EKG 60 Mins

10g Fuggles 60 Mins

20g Fuggles 10 Mins

20g EKG 1 Min

Irish Moss 2tsp 15 Mins

All seemed to tick all of the boxes and I estimated 65% efficiency because I am new to this and don't know what I am doing. No idea what it will turn out like as it is my first ever all grain brew, well first with any grain actually.

It calculated an OG of 1.047, and I got 1.058 so is likely to end up at 7.5% Ended up with 10L in the FV.

How do I work out what my system efficiency is so I can be nearer the mark next time? Or how does anyone work this out?

(And thank you to this forum and all contributing members for getting me this far)