It's an easy, moist coffee cake ideal for breakfast or as a snack with your afternoon coffee. It's completely egg-free, making it a great option for those with dietary restrictions or who love a tender, delicious cake. This eggless coffee cake can be made with vegan or regular butter.
Preheat your oven to 350°F (175°C) and grease an 8x8-inch baking pan or line the pan with parchment paper for easier removal after baking. Cut the plums in half and remove the pit. Then slice each half into 1/4-inch thick wedges.
Cream together the softened butter and cane sugar in a large bowl until it’s light and fluffy. Add the silken tofu and vanilla extract, mixing until smooth. In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Slowly fold the dry ingredients into the wet mixture until just combined, careful not to overmix.
Pour the batter into your prepared pan and smooth it out. Arrange the plum slices on top in a single layer, pressing them slightly into the batter.
In a small bowl, combine the flour, sugar, and cinnamon. Use your fingers or a pastry cutter to blend in the chilled butter until the mixture has a crumbly texture. Sprinkle the streusel evenly over the plums.
Place the cake in the oven and bake for 40-45 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool for 10 minutes in the pan before transferring it to a wire rack to cool completely.