- Preheat the oven to 375°F (190°C). Line a large baking sheet (about
 16 x 14 inches [40 x 35 cm]) with parchment paper. 
- In a bowl, mix together the ground flax seeds and plant-based milk to
 form a flax “egg” and set the mixture aside. 
- In another bowl, mix together the peanut butter, maple syrup and 
1/4 teaspoon of salt until you have a smooth peanut butter caramel. 
- In a bowl with a handheld mixer or with a stand mixer, cream together 
the softened vegan butter and light brown sugar for at least 2 minutes. 
Add the flax “egg” and continue beating for a minute. 
- In another bowl, whisk together the flour, baking powder, baking 
soda and 1/2 teaspoon of salt. 
- Combine the dry ingredients with the creamed butter, sugar and flax
 “egg” mixture. Mix the ingredients together until you have a firm
 cookie dough batter. Fold in the chocolate chips and knead with your
 hands to get a firm dough. 
- Flatten about half of the cookie dough into a round pizza shape that 
is about 9½ inches (24 cm) in diameter. 
- Spread the peanut butter caramel evenly on top of the pizza. Add the 
second cookie dough layer on top of the peanut butter caramel layer.
The peanut butter will spread a bit from the edges, but you can fold it 
in with the cookie dough edges. 
- Bake the cookie pizza in the oven for 12 to 15 minutes. With
 12 minutes of baking time, you will have a soft and gooey cookie 
pizza. The more you bake the cookie pizza, the less gooey it becomes. 
- Store the cookie pizza well covered at room temperature for up to
 3 days so that it stays soft. If you want it to be firmer and also easier to 
slice, store it in the refrigerator for up to 6 days.