Creating Raspberry Brownie Parfaits is a seamless process when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and line a 9×13-inch baking dish with parchment paper.
2. Melt Butter: In a saucepan over medium heat, melt the butter. Remove from heat and let it cool slightly.
3. Mix Sugars: In a large mixing bowl, combine the granulated and brown sugars. Pour the melted butter over the sugars and mix until well combined.
4. Add Eggs and Vanilla: Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
5. Mix Dry Ingredients: In a separate bowl, whisk together the flour, cocoa powder, and salt.
6. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Fold in chocolate chips if desired.
7. Bake Brownies: Pour the batter into the prepared baking dish and spread evenly. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
8. Cool Brownies: Let the brownies cool in the pan for at least 1 hour before cutting them into small, bite-sized squares.
9. Prepare Whipped Cream: In a large bowl, beat the heavy whipping cream, powdered sugar, and vanilla extract until soft peaks form.
10. Layer the Parfaits: Start by placing a layer of brownie squares at the bottom of your serving glasses. Next, add a layer of raspberries followed by whipped cream. Repeat the layers until the glasses are filled, finishing with whipped cream on top.
11. Garnish: If desired, garnish the parfaits with extra raspberries and mint leaves for an elegant touch.