Gooey, fudgy, dairy-free brownies with Oreo pieces.
Preheat your oven to 180°C/350°F (or 160°C/325°F for fan or convection ovens). Line an 8x10-inch tin with baking paper.
Mix the flour, baking powder, cocoa powder and sugar together in a large bowl.
Add the melted margarine, soy milk and vanilla extract. Mix well until you have a smooth, thick brownie batter.
Stir in the chocolate chips, then stir in the Oreo pieces, saving a few for the top.
Spoon the thick batter into your tin and spread it out as evenly as you can. Top with the remaining Oreo pieces and extra chocolate chips if desired.
Bake for 22 minutes. Let them cool in the tin for 30 minutes at room temperature then transfer them to the fridge for 2 hours to set.
After the 2 hours are up, remove the brownies from the tin and cut into 12 square slices.