Custard filled Ring Doughnuts - Grace Stevens

Ingredients

• 750 ml flour
• 7.50 ml salt
• 60 ml castor sugar
• 100 g butter (room temperature) & 100g for filling
• 15 g fresh yeast
• 250 ml tepid milk
• 2 eggs
• oil to deep fry
• 375 ml milk
• 75 ml castor sugar
• 30 ml flour
• 20 ml corn flour
• 3 egg yolk
• 5 ml vanilla extract
• 15 ml cinnamon
• 250 ml castor oil
• Custard filling