1-First step: mix the dry ingredients Start by grabbing a medium bowl and whisking together the 2 1/2 cups all-purpose flour, 1/2 teaspoon baking powder, and 1/4 teaspoon salt. Mixing these first helps spread the baking powder and salt evenly through the flour. This step matters because even distribution gives you a better cookie texture from edge to center. Use a whisk or fork to break up any clumps. If the flour is packed tightly in the cup, the dough can become dry and harder to shape. For best results, spoon the flour into the measuring cup and level it off.

2-Second step: cream the butter and sugar In a separate large bowl, beat 1 cup softened unsalted butter with 3/4 cup granulated sugar until the mixture looks pale and fluffy. This usually takes a few minutes with a hand mixer or stand mixer. Creaming adds air to the dough, which helps create a softer cookie. Make sure the butter is softened, not melted. Softened butter blends smoothly with the sugar, while melted butter can make the dough greasy and harder to chill. If you are baking in a warm kitchen, work quickly so the butter stays at the right texture.

3-Third step: add the egg and vanilla Beat in 1 large egg and 1 teaspoon vanilla extract until combined. The egg helps bind the dough, and the vanilla adds a warm background flavor that balances the guava filling. Scrape down the sides of the bowl if needed so everything mixes evenly. At this stage, the dough should still look creamy. If it starts to curdle a little, that is usually fine. Once the flour goes in, the texture will come together.

4-Fourth step: add the dry mixture Slowly add the flour mixture to the butter mixture and mix just until combined. Stop as soon as the dough comes together. Overmixing can make the cookies tough, which is one of the most common mistakes in Easy Guava Lava Cookies. If the dough feels a little sticky, that is normal. Do not add extra flour unless it is truly too soft to handle. The chilling step will help the dough firm up.

5-Fifth step: chill the dough Cover the bowl and refrigerate the dough for at least 1 hour. This step is important because chilled dough is easier to shape and less likely to spread too much in the oven. It also helps the butter firm up, which supports that soft center and neat cookie shape.

6-Sixth step: prepare the guava filling While the dough chills, cut 1 cup guava paste into small cubes. The pieces should be small enough to fit inside the dough and seal easily. If the pieces are too big, the dough may split open during baking and the filling can leak out. Work with a sharp knife and a cutting board. If the guava paste sticks to the knife, lightly oil the blade or use a little flour on the surface. Small, neat cubes make assembly much easier.

7-Seventh step: assemble the cookies Preheat the oven to 350°F and line a baking sheet with parchment paper. Take the chilled dough out of the fridge and scoop or pinch off portions. Flatten each piece in your palm, place a cube or two of guava paste in the center, then wrap the dough around it and roll it into a ball. Place the dough balls on the baking sheet, leaving about 2 inches between each one. That space helps the cookies bake evenly and gives them room to spread a little. If the cookies are packed too closely, they can bake into one another.

8-Eighth step: bake until lightly golden Bake the cookies for 12 to 15 minutes, or until the edges are lightly golden. The centers may still look a little soft when you pull them out, and that is fine. They will continue to set as they cool on the baking sheet. Try not to overbake. If they go too far, the cookies can lose their soft texture and the guava center may become too thick. Watch the last few minutes closely, since oven temperatures can vary.

9-Ninth step: cool and serve Let the cookies cool on the baking sheet for a few minutes, then move them to a wire rack. This helps them finish setting without getting soggy on the bottom. Once cooled, serve them as they are or dust them with powdered sugar for a simple finish. These cookies taste great with coffee, tea, or a cold glass of milk. They also make a nice dessert for parties because the guava center gives each bite a fun surprise.