These delightful bars combine the crunch of peanuts with the gooey sweetness of marshmallows, creating a treat that's perfect for any occasion.
Preheat your oven to 350°F (175°C).
Always preheat your oven to ensure even baking.
In a mixing bowl, combine the butter, egg, flour, brown sugar, and baking powder until crumbly.
Use a fork or pastry cutter to achieve a crumbly texture.
Press the mixture evenly into the bottom of an ungreased 13x9 inch baking pan.
Use the back of a spoon to press the mixture firmly and evenly.
Bake in the preheated oven for 12-15 minutes until lightly golden.
Keep an eye on the edges to prevent over-baking.
Remove the pan from the oven and immediately sprinkle the marshmallows evenly over the base.
Ensure the marshmallows cover the base completely for even melting.
Return the pan to the oven for 1-2 minutes until the marshmallows puff slightly.
Do not overheat the marshmallows to avoid burning.
In a saucepan, heat the corn syrup, vanilla extract, and chocolate chips over low heat until smooth, stirring constantly.
Stir continuously to prevent the mixture from sticking to the pan.
Remove from heat and stir in the peanuts.
Ensure the peanuts are evenly coated with the mixture.
Pour the warm topping over the marshmallows and spread evenly.
Work quickly as the topping sets fast.
Allow the bars to cool completely, then cut into squares and serve.
Use a sharp knife for clean cuts.