Using this brew calculator:
https://www.brewersfriend.com/homebrew/recipe/calculatorI get 4Kg base malt gives me an OG of 1051 and an FG of 1013 (51/4 = 12.75)
Now I could repeat this the next day and get an 8% beer. Too hard so I will use malt extract to beef up the beer.
A 1.5Kg can of Coopers light liquid malt extract (buy one with two years before the “best before” date to not get a nasty extract tang) will give me 21 gravity units so OG becomes 51 + 21 = 72GU.
What if no fresh liquid malt is available? Turn to dry extract reluctantly—no idea how old that extract is and dry extract never ferments completely so we can use 75% dry extract + 25% dextrose. Nah, strictly last resort.
Finally, 1Kg honey gives an OG of 16GU.
So our Christmass Ale has an OG of 51 + 21 + 16 = 88GU. Perfect! The expected FG would be 88/4 = 22 but with the honey would be a bit lower than that. To get the FG down a tad more I would use a yeast like Lallemand Nottingham Ale Yeast.
Nottingham works pretty hard, ferment more than the usual amount of sugar. Rehydrate in 120ml 40°C water and pitch. Then 24 hours later I would run the fermenting beer from one fermenter into another fermenter placed below it. This hugely aerates the wort-turning-into-beer helping the yeast ferment cleanly and completely. A week later when the ferment is complete I would pitch another packet of Nottingham—clean up any off flavors and ferment another point or two.
Nottingham is a clean, neutral yeast. It adds the fruitiness ale yeasts add but not much. It also ferments at lower temperatures, again aiding cleanness in the finished beer. Good for Tassie autumns!
With malt, hop and spice flavors who cares if the yeast is neutral?
This beer would be fine for a couple of years—the extract could add off flavors after that. Be a nice winter drink the winter following Christmass and then at the next Christmass.