Preheat the oven to 170° C/325°F/Gas Mark 3
I like to get all my ingredients weighed out and ready when baking any cakes, even this easypeasy one.
Half melt the 90 grams butter in a medium sized saucepan over a gentle heat and remove before it is all melted. Set it aside for a couple of minutes until all the butter has melted.
Add to the saucepan 200 grams sour cream, 1 egg, 140 grams sugar and 1 tbsp of vanilla extract and stir until everything is completely mixed in.
Add in the 220 grams of flour, ½ tsp bicarbonate of soda and pinch of salt.
Mix well and thoroughly until the batter is smooth and lump free. I use a whisk as there are lumps in the mixture at first.
Add the chocolate chips and mix through.
Empty out the batter into your lined tin and gently smooth over.
Bake for about 50 minutes until golden brown and a cocktail stick or similar comes out clean when inserted in the middle.
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