01 - Preheat oven to 350°F (175°C). Thoroughly grease and flour a 10-cup bundt pan to ensure easy release.
02 - In a medium bowl, whisk together all-purpose flour, unsweetened cocoa powder, baking soda, and salt until evenly blended.
03 - In a large mixing bowl, beat unsalted butter, vegetable oil, and granulated sugar with an electric mixer until light and fluffy.
04 - Add eggs one at a time, mixing thoroughly after each addition for a smooth, cohesive batter.
05 - Blend in buttermilk, pure vanilla extract, red food coloring, and white vinegar, ensuring the mixture is well combined.
06 - Gradually fold the dry ingredient mixture into the wet ingredients, mixing just until incorporated; avoid overmixing to maintain a tender crumb.
07 - Pour the batter into the prepared bundt pan. Smooth the top and bake for 45 to 50 minutes, or until a toothpick inserted in the center emerges clean.
08 - Let the cake cool in the pan for 15 minutes, then carefully invert onto a wire rack to cool completely before glazing.
09 - In a small saucepan, combine raspberries, granulated sugar, water, and lemon juice. Heat over medium, stirring until berries break down. Add cornstarch slurry and cook, stirring, until thickened, about 2 to 3 minutes. Strain to remove seeds if desired. Allow to cool fully.
10 - Beat softened cream cheese until smooth. Add powdered sugar, milk, and vanilla extract, mixing until a thick but pourable glaze forms.
11 - Once cake is completely cool, drizzle with cream cheese glaze. Decorate with raspberry sauce in a ‘blood’ pattern and serve additional sauce alongside.