Prepare the pizza base according to the recipe or packet instructions.
Preheat the oven to 190 degrees C. Line a baking tray with baking powder.
In a frying pan over medium heat, melt the butter and olive oil then add the sliced onions. Cook over medium heat stirring occasionally until caramelised; about 10 to 15 minutes.
Take the prepared pizza base and place on the prepared baking tray. Top first with the caramelised onions, then the pears and the crumbled blue cheese. Sprinkle with pine nuts, if using. Season to taste with salt and pepper.
Bake in the preheated oven for 10 to 20 minutes or until the base is crispy and the cheese melted.