Line a baking sheet with either a silicone mat or wax paper.

Put the pumpkin puree, butter, milk and sugar in a small pan and warm over a medium heat. Bring to a simmer and boil for around a minute. Remove from heat.

Meanwhile, put both kinds of oats in a bowl, add the pumpkin spice and salt and mix through.

Add the vanilla to the pumpkin-butter mixture and add it to the bowl with the oats. Mix well.

Take spoonfuls of the mixture (I used a slightly heaped tablespoon measure) and press together slightly as you form into a slightly flattened ball. Set on the prepared baking sheet and allow to cool.