Blackberry and Dark Chocolate Spiderweb Tart

By AislePrompt Editorial · Published 2026-04-24 · Updated 2026-04-24

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

A delicate tart with a sweet blackberry filling and a dark chocolate spiderweb design that crawls across the top, perfect for a Halloween gathering. This American-inspired Halloween recipe, ready in about 55 minutes, layers all-purpose flour, unsalted butter, sugar into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 320 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 30 min Cook: 25 min Serves 6 American cuisine 320 cal/serving

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Ingredients

1 1/2 cups all-purpose flour
1/2 cup, cold and cubed unsalted butter
1/4 cup sugar
1/4 teaspoon salt
3 cups fresh blackberries
1/2 cup sugar
2 tablespoons cornstarch
1 tablespoon lemon juice
2 ounces dark chocolate
1 tablespoon coconut oil

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Instructions

Step 1: Preheat oven to 375°F. In a food processor, pulse 1 1/2 cups all-purpose flour, 1/2 cup cold cubed unsalted butter, 1/4 cup sugar, and 1/4 teaspoon salt until mixture resembles coarse crumbs. Press into a 9-inch tart pan and bake for 15 minutes until golden.
Step 2: While crust bakes, combine 3 cups fresh blackberries, 1/2 cup sugar, 2 tablespoons cornstarch, and 1 tablespoon lemon juice in a saucepan. Simmer over medium heat for 5 minutes until thickened and coating the back of a spoon.
Step 3: Pour blackberry filling into cooled crust and refrigerate 1 hour. Melt 2 ounces dark chocolate with 1 tablespoon coconut oil in a double boiler until smooth. Drizzle melted chocolate in thin lines across tart to create a spiderweb pattern.