In a pot melt 200g butter, 400g sweetened condensed milk, 4 tbsp golden syrup, 1 tsp vanilla essence. Stir together until thick.
Pre-heat the oven to 180 C and grease and line a large slice tin, make sure the paper comes over the sides.
2 cups plain flour, 1 cup SR flour, 1 cup coconut, 2 cups brown sugar, 3 cups rolled oats, 2 eggs, 300g melted butter.
Press two-thirds of the mixture into the tin. Pour over the caramel and scatter the remaining mixture over the top.