1-Prepare Your Workspace: Start with mise en place to keep things smooth. Line an 8×8-inch pan with parchment paper, leaving overhangs for lifting. Heat-treat the flour: spread 3/4 cup on a baking sheet and bake at 350°F for 5 minutes. Cool completely. This step takes 10 minutes and ensures safety by eliminating bacteria risks. Gather all tools: mixing bowls, saucepan, spatula, and measuring cups. Softening butter ahead saves time.

2-First Step: Make the edible cookie dough. In a medium bowl, beat 1/2 cup softened butter, 1/4 cup sugar, and 1/4 cup brown sugar until fluffy, about 2 minutes. Add 2 tbsp milk and 1 tsp vanilla, mixing well. Stir in cooled 3/4 cup heat-treated flour and 1/4 tsp salt until a dough forms. Fold in 1/3 cup mini chocolate chips. Press into a flat disc, cover, and chill for 15 minutes. This dough stays soft and safe, mimicking raw cookie dough without eggs.

3-Second Step: Chunk the dough. Remove from fridge and cut into small 1/2-inch pieces, yielding about 1.5 cups. Set aside half if you want extra mix-ins later. Work quickly to avoid warming. These chunks provide chewy contrast to the smooth fudge.

4-Third Step: Melt the base ingredients. In a saucepan over low heat, combine 14 oz sweetened condensed milk, 3 cups white chocolate chips, and 1/4 cup butter. Stir constantly for 5 to 7 minutes until smooth and glossy, reaching about 160°F. Avoid high heat to prevent scorching; use a double boiler if needed. The mixture thickens as it melts, creating that fudgy pull.

5-Fourth Step: Fold in cookie dough. Remove from heat and gently stir in 1.5 cups dough chunks until evenly distributed. Add sprinkles or nuts here for variety. Work fast before it sets.

6-Fifth Step: Spread into pan. Pour mixture into prepared pan, smoothing top with a spatula. Tap pan on counter to release bubbles. For patterns, swirl with a knife.

7-Final Step: Chill and cut. Refrigerate for 2 to 3 hours until firm. Lift out using parchment, then cut into 16 to 20 squares. Store as below. Serve at room temp for best creaminess. Total time: 20 minutes active, plus chilling. Troubleshoot graininess by remelting gently with a splash of milk.