In a skillet, combine butter and both the sugars. Cook on low heat until the sugars melt, then take off heat.
Cool and transfer to a mixing bowl along with the egg and vanilla. Stir to combine.
Add the self rising flour and stir to combine.
Do not overmix. Stop stirring once the mixture looks uniform.
Transfer to the skillet and top with chocolate chunks.
Pop in the oven preheated at 350°F and bake for 18-20 minutes or until the edges look crispy and the centre still looks a bit gooey.
Remove, allow to cool slightly and serve with vanilla ice cream.
Notes
Use an oven-safe skillet with an oven-safe handle, preferably cast iron, to ensure even baking and beautifully golden edges.
Melt the butter and sugars over low heat, stirring gently until combined. Avoid overheating the mixture, as the sugar can burn.
Allow the melted butter and sugar mixture to cool slightly before adding the egg to prevent it from scrambling.
Use self-rising flour for this recipe, as it already contains a raising agent and salt. Regular all-purpose flour cannot be substituted directly.
Spoon the flour into your measuring cup and level it off rather than packing it down to avoid a dry, dense cookie.
Stir the flour into the wet ingredients just until combined. Overmixing can make the pizookie tough instead of soft and tender.
Spread the cookie dough evenly in the skillet so the edges and center bake consistently.
Use chopped semisweet or dark chocolate for rich, melted chocolate pockets, or substitute milk chocolate chunks for a sweeter version.
Add chopped walnuts, pecans, or a sprinkle of flaky sea salt for extra flavor and texture.
Bake at 350°F for 18–20 minutes, or until the edges are golden and set while the center remains soft but no longer looks like wet batter.
Avoid overbaking the pizookie, as it will continue to cook slightly in the hot skillet after being removed from the oven.
Let the pizookie cool for a few minutes before serving with vanilla ice cream, chocolate sauce, or caramel sauce.
Store leftovers without ice cream in an airtight container at room temperature for up to 2 days or refrigerate for up to 5 days. Reheat briefly before serving.