01 - Preheat oven to 350°F. Grease and flour a 9x5-inch loaf pan or 10-cup bundt pan thoroughly.
02 - Toss diced strawberries and pineapple with 2 tablespoons flour in a medium bowl until lightly coated. Set aside.
03 - Whisk together remaining flour, baking powder, and salt in a separate bowl.
04 - Beat butter and granulated sugar with electric mixer on medium speed until light and fluffy, approximately 3-4 minutes.
05 - Add eggs one at a time, beating thoroughly after each addition until fully incorporated.
06 - Mix in vanilla extract and sour cream until smooth.
07 - Gradually add flour mixture alternating with milk, beginning and ending with flour. Mix until just combined; avoid overmixing.
08 - Gently fold floured strawberries and pineapple into batter until evenly distributed.
09 - Transfer batter to prepared pan and smooth top surface with spatula.
10 - Bake for 55-65 minutes until toothpick inserted in center comes out clean. Tent with foil after 40 minutes if top browns too quickly.
11 - Let cake cool in pan for 15 minutes, then invert onto wire rack to cool completely before glazing.
12 - Whisk powdered sugar with pineapple juice until smooth and drizzle over completely cooled cake.