01 - Preheat oven to 350°F. Grease and line an 8-inch square baking pan.
02 - In a large bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt until well blended.
03 - Add buttermilk, vegetable oil, egg, and vanilla extract to the dry mixture. Beat until smooth. Pour in hot water and mix until fully incorporated.
04 - Pour batter into prepared pan. Bake for 25 to 30 minutes or until a toothpick inserted in center comes out clean. Cool completely in pan.
05 - Whip heavy cream with powdered sugar, vanilla extract, and cream cheese until medium-stiff peaks form. Refrigerate until ready to use.
06 - Break cooled cake into small pieces and crumble into fine, soil-like texture.
07 - Layer crumbled cake in the bottom of clean flower pots or dessert cups. Add creamy filling on top. Finish with another layer of cake crumbs.
08 - Generously sprinkle chocolate cookie crumbs over the top layer to resemble garden soil.
09 - Arrange edible flowers, mint leaves, and herb sprigs on top to mimic a blooming garden.
10 - Refrigerate assembled pots for at least 30 minutes to set flavors and texture.