How My Grandmother's Tres Leches Brought Sweet Joy

Ingredients

• 1 cup (120 g) all-purpose flour
• 1 tsp baking powder
• ½ cup (100 g) granulated sugar
• ¼ cup (60 ml) whole milk
• 1/3 cup (80 ml) vegetable oil
• 3 large eggs
• 1 tsp vanilla extract
• 1 cup (240 ml) sweetened condensed milk
• 1 cup (240 ml) evaporated milk
• 1 cup (240 ml) heavy cream
• 1 cup (240 ml) heavy whipping cream
• 2 tbsp (30 g) powdered sugar
• ½ tsp vanilla extract
• Ground cinnamon, for garnish