Lager and ginger cake

My boyfriend baked for this month's Clandestine Cake Club - a typically male recipe, lager and ginger cake! It was lovely - I'm not a lager fan, but this cake just had a subtle hint of lager. Steve wasn't happy with the overall look of the cake - he called it 'mashed potato cake' - but I was proud of it.

110g light muscovado sugar
110g unsalted butter
30g golden syrup
55g runny honey
225g plain flour
½ teaspoon bicarbonate of soda
2 teaspoons ground ginger
2 eggs
2 tablespoons lager - we used San Miguel 

For the buttercream, Steve didn't measure (I never do - just chuck the butter and icing sugar together until it looks right - and added a little lager into this too). 

Preheat the oven to 180C (160C fan). 
Place the sugar, butter, golden syrup and honey in a saucepan over a gentle heat until all the ingredients have melted, leaving a smooth thick paste. 
Put the flour, bicarbonate of soda and ginger into a large mixing bowl and combine.
Pour the melted ingredients into the flour and stir well. The mix will be very thick and more like fudge at this point. 
Beat in the eggs.
Add the lager. 
Bake for about 45 - 50 minutes. 

Make the buttercream and smooth over the top (attempting not to make it look like mashed potato).