Would you be willing to share some of your learning on your Scottish ale recipe? I just got a batch of Wyeast 1728 Scottish Ale so fancy giving the style a try.
Happy to. The below is the structure used in my latest effort which I reckon I'll stick to pretty much with only minor tweaks or swaps. Although I feel like I've arrived at this recipe design through my own tinkering etc, I will happily admit to have referred to many established recipes in books and online - Jamil's recipe from Brewing Classic Styles was my main inspiration.
75% Base malt - Golden promise is what I used last and liked but MO also works well IMO. I think pretty much any pale malt would work.
12.5% Light/Medium crystal - I like British caramalt here but have also experimented with the lighter German Caramunich malts.
5% Speciality/Character malt - i.e. Melanoidan. I've also used Aromatic.
6.2% Dark Crystal - My favourite here is Special B or British extra dark crystal. I'm keen to try Simpsons' Double Roasted Crystal which sounds lovely.
1.6% Roast malt - I tend to use chocolate, pale chocolate, or a mixture of the two. If you're using Roasted Barley I would probably keep it to 1% or below.
Bittering charge to 15 IBU in this recipe which translates to an OG/IBU ratio of 0.31. I haven't used any aroma hops but might try a subtle amount in future - possibly for an orangey or dark berry aroma hop.
I mash high at 70-72, single infusion but you could also play about with lower IBU. I would also go lower on the base malt, 70% or maybe even a tad lower, and up the crystal, particularly for a lower ABV version where you still want a really full flavour and mouthfeel. I've also thought of adding some Simpons Golden Naked oats to see what that would bring.
For yeast, again I've tried a few. Wyeast Scottish ale is one of my all time favourites and works really well. I've also tried the Chico approach, which Jamil recommends, with good results, i.e. WLP001 or US-05. It's a slight step away from the style guidelines but Wyeast West Yorkshire (another favourite of mine) works really nicely too if you keep the temps on the low side. I think a lager yeast would be fun to try too.
Hope this helps.