01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or a 10-cup bundt pan.
02 - In a medium bowl, toss diced strawberries and pineapple with 2 tablespoons flour to coat. Set aside.
03 - In a separate bowl, whisk together remaining flour, baking powder, and salt.
04 - Using an electric mixer on medium speed, beat butter and sugar until light and fluffy, about 3–4 minutes.
05 - Add eggs one at a time, beating well after each addition.
06 - Mix in vanilla extract and sour cream until fully combined.
07 - Gradually add flour mixture to wet ingredients, alternating with milk. Begin and end with flour mixture. Mix until just combined.
08 - Gently fold floured strawberries and pineapple into the batter.
09 - Pour batter into prepared pan and smooth the top evenly.
10 - Bake for 55–65 minutes, or until a toothpick inserted into the center comes out clean. Tent with foil after 40 minutes if top browns too quickly.
11 - Let cool in pan for 15 minutes, then invert onto a wire rack to cool completely.
12 - Whisk powdered sugar with pineapple juice until smooth. Drizzle over cooled cake.