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.