Good ole Matilda’s Chocolate Cake

Ingredients

• 1 & 3/4 cups (230g) all purpose flour
• 1/4 cup (30g) cornstarch
• 1 cup (100g) unsweetened cocoa powder
• 2 tsp baking soda
• 1 tsp baking powder
• 1/2 tsp kosher salt
• 1 cup (200g) granulated sugar
• 1 cup (205g) dark brown sugar, packed
• 1/2 cup (108g) vegetable oil
• 1 cup (230g) mayonnaise
• 3 large eggs + 1 egg yolk
• 1/2 cup (128g) milk
• 1 tbsp vinegar
• 2 tsp vanilla extract
• 1 cup (240g) hot coffee
• Frosting: 2 cups (450g) unsalted butter, room temp
• 1 1/2 cups (165g) powdered sugar
• 3 tbsp corn syrup
• 1 tsp vanilla extract
• Pinch of kosher salt
• 3/4 cup (177g) warm water
• 3/4 cup (75g) dutch process cocoa powder
• 10 oz dark chocolate chips, melted and cooled slightly