Preheat your oven to 350 Fahrenheit (177 Celsius) & grease an 8-inch x 8-inch glass baking dish

Make the Batter

1. If you haven’t done so already, melt the unsalted butter.
2. In a medium-sized mixing bowl, add the all-purpose flour, baking powder, kosher salt, and pumpkin spice seasoning. Whisk together until fully combined – about 1 minute.
3. In a separate medium-sized mixing bowl, add the brown sugar, egg, pumpkin purée, vanilla extract, and pumpkin spice extract (if using). Whisk together until smooth.
4. Add half of the melted butter to the bowl with the wet ingredients and whisk everything together until you get a smooth mixture with no butter streaks.
5. Add the other half of the melted butter to the wet ingredients and again whisk together until you get a smooth mixture with no butter streaks.
6. Pour the wet ingredients into the dry ingredients, scraping the bowl of wet ingredients with a spatula to make sure none of the mixture is left behind.
7. Whisk the wet and dry ingredients together until you get a smooth batter with no flour patches.

Bake the Bars

1. Pour the batter into the greased baking dish and smooth the top with a spatula.
2. Evenly top the batter with white chocolate chips and slightly press the chips into the batter with your hands or the back of a spoon.
3. Bake the pumpkin bars on the middle rack of your oven for 40 minutes or until a chopstick/knife can be inserted into the batter and comes out clean.
4. Allow to cool and enjoy!